My Account (Sign in)
Your basket is empty.
0
Basket
contact us by phone Help and contact
Free standard delivery over £199
100-day return policy
My Account (Sign in)
Wish list
Your basket is empty. (0)
Basket
Newsletter Newsletter
Sale

Over 300,000 customers - we say thank you!

4.93/5 "Very good" (1400+ reviews)

40,000+ products for hunting and shooting sports

Gunsmith Tools Measuring Tools Headspace Gauges CLYMER 30-40 KRAG GO GAUGE HEADSPACE GAUGE STEEL Support

Ensure precise chamber work with the CLYMER 30-40 Krag GO Gauge, designed for accuracy and safety in firearms, compatible with .303 British.
Offer

CLYMER 30-40 KRAG GO GAUGE HEADSPACE GAUGE STEEL

184100302

Filters:

Variations
Filters:
Variations:

Variations:

Offer
Ensure precise chamber work with the CLYMER 30-40 Krag GO Gauge, designed for accuracy and safety in firearms, compatible with .303 British.
GO HEADSPACE GAUGES - 30-40 KRAG GO GAUGE HEADSPACE GAUGE STEEL
46.9 GBP 4 £46.90 * £48.90
In stock
Cartridge: 30-40 Krag, 303 British Color: Steel Height: 0.44'' Length: 0.73'' Material: Steel Model Number: 30-40 Krag GO Style: Go Gauge Weight: 0.1 lbs Width: 0.44'' Product no.: 184100302
In stock
46.9 GBP 4 £46.90 * £48.90
-9 %
Ensure precision and safety in your chamber work with the CLYMER 5.56x45mm NATO GO Headspace Gauge, a must-have tool for every gunsmith.
GO HEADSPACE GAUGES - 5.56X45MM NATO GO GAUGE HEADSPACE GAUGE STEEL
49.9 GBP 3 £49.90 * £54.90
In stock
Cartridge: 5.56 mm NATO Color: Steel Height: 0.355'' Length: 1.623'' Material: Steel Model Number: 5.56x45mm NATO GO Style: Go Gauge Weight: 0.1 lbs Width: 0.355'' Product no.: 184000035
In stock
49.9 GBP 3 £49.90 * £54.90
Offer
Ensure safe chambering with Clymer Go Headspace Gauges, precision-crafted from hardened steel, available in various calibers for reliable gunsmithing.
GO HEADSPACE GAUGES - 22 LONG RIFLE GO GAUGE HEADSPACE GAUGE STEEL
46.9 GBP 2 £46.90 * £48.90
In stock
Cartridge: 22 Long Rifle, 22 Short, 22 Long, 22 Bentz, 22 Match Color: Steel Height: 0.284'' Length: 0.75'' Material: Steel Model Number: 22 Long Rifle Go Style: Go Gauge Weight: 0.1 lbs Width: 0.284'' Product no.: 184100220
In stock
46.9 GBP 2 £46.90 * £48.90
Offer
Ensure precision and safety in your chamber work with CLYMER's 6mm BR GO Headspace Gauge, designed for .22 Rem BR, 6mm BR, and 7mm BR calibers.
GO HEADSPACE GAUGES - 6MM BR GO GAUGE HEADSPACE GAUGE STEEL
46.9 GBP 14 £46.90 * £48.90
In stock
Cartridge: 7 mm BR (Benchrest) Remington, 22 BR (Benchrest) Remington, 6 mm BR Color: Steel Height: 0.46'' Length: 1.317'' Material: Steel Model Number: 6mm BR GO Style: Go Gauge Weight: 0.1 lbs Width: 0.46'' Product no.: 184100222
In stock
46.9 GBP 14 £46.90 * £48.90
Offer
Ensure precision and safety in your chamber work with the CLYMER GO Headspace Gauges, specifically designed for .22 Rimfire Mag and .22RFM.
GO HEADSPACE GAUGES - 22 WRF GO GAUGE HEADSPACE GAUGE STEEL
47.9 GBP 18 £47.90 * £49.90
In stock
Cartridge: 17 HMR, 22 WRF, 22 RF Color: Steel Height: 0.284'' Length: 0.75'' Material: Steel Model Number: 22 WRF GO Style: Go Gauge Weight: 0.1 lbs Width: 0.284'' Product no.: 184100230
In stock
47.9 GBP 18 £47.90 * £49.90
Offer
Ensure safe chambering with Clymer Go Headspace Gauges, precision machined from hardened steel for durability and accuracy across various calibers.
GO HEADSPACE GAUGES - 22 HORNET GO GAUGE HEADSPACE GAUGE STEEL
46.9 GBP 17 £46.90 * £48.90
In stock
Cartridge: 22 Hornet, 17 Hornet Color: Steel Height: 0.284'' Length: 0.75'' Material: Steel Model Number: 22 Hornet GO Style: Go Gauge Weight: 0.1 lbs Width: 0.284'' Product no.: 184100235
In stock
46.9 GBP 17 £46.90 * £48.90
Offer
Ensure firearm safety with Clymer Go Headspace Gauges, precision-engineered from hardened steel for accurate measurements across various calibers.
GO HEADSPACE GAUGES - 223 REMINGTON GO GAUGE HEADSPACE GAUGE STEEL
46.9 GBP 20 £46.90 * £48.90
In stock
Cartridge: 223 Remington, 6 mm x 45 Color: Steel Height: 0.355'' Length: 1.623'' Material: Steel Model Number: 223 Remington GO Style: Go Gauge Weight: 0.1 lbs Width: 0.355'' Product no.: 184100240
In stock
46.9 GBP 20 £46.90 * £48.90
Offer
Ensure precise chamber measurements with the CLYMER 22-250 Remington GO Headspace Gauge, essential for safe and accurate gunsmithing.
GO HEADSPACE GAUGES - 22-250 REMINGTON GO GAUGE HEADSPACE GAUGE STEEL
46.9 GBP 2 £46.90 * £48.90
In stock
Cartridge: 22-250 Remington Color: Steel Height: 0.405'' Length: 1.733'' Material: Steel Model Number: 22-250 Remington GO Style: Go Gauge Weight: 0.1 lbs Width: 0.405'' Product no.: 184100250
In stock
46.9 GBP 2 £46.90 * £48.90
Offer
Ensure safe and accurate chamber work with Clymer Go Headspace Gauges, crafted from durable steel to meet SAAMI specs for various calibers.
GO HEADSPACE GAUGES - 250 SAVAGE GO GAUGE HEADSPACE GUAGE STEEL
46.9 GBP 10 £46.90 * £48.90
In stock
Cartridge: 250 Savage Color: Steel Height: 0.45'' Length: 1.722'' Material: Steel Model Number: 250 Savage GO Style: Go Gauge Weight: 0.1 lbs Width: 0.45'' Product no.: 184100255
In stock
46.9 GBP 10 £46.90 * £48.90
Offer
Clymer Go Headspace Gauges ensure precise chamber measurements, durable steel construction, and a wide range of calibers for safe, reliable firearm work.
GO HEADSPACE GAUGES - 308 WINCHESTER GO GAUGE HEADSPACE GAUGE STEEL
46.9 GBP 2 £46.90 * £48.90
In stock
Cartridge: 308 Winchester, 243 Winchester, 7 mm - 08 Remington, 358 Winchester, 260 Remington Color: Steel Height: 0.45'' Length: 1.722'' Material: Steel Model Number: 308 Winchester GO Style: Go Gauge Weight: 0.1 lbs Width: 0.45'' Product no.: 184100260
In stock
46.9 GBP 2 £46.90 * £48.90
Offer
CLYMER Go Headspace Gauges ensure precision and safety in chamber work, crafted from durable steel to meet SAAMI specs and available in various calibers.
GO HEADSPACE GAUGES - 7MM MAUSER GO GAUGE HEADSPACE GAUGE STEEL
46.9 GBP 7 £46.90 * £48.90
In stock
Cartridge: 257 Roberts, 7 mm Mauser (7 x 57 mm Mauser) Color: Steel Height: 0.43'' Length: 1.952'' Material: Steel Model Number: 7mm Mauser GO Style: Go Gauge Weight: 0.1 lbs Width: 0.43'' Product no.: 184100280
In stock
46.9 GBP 7 £46.90 * £48.90
Offer
The CLYMER .284 Winchester GO Headspace Gauge ensures precise chamber measurements, enhancing safety and accuracy in your firearm work.
GO HEADSPACE GAUGES - 284 WINCHESTER GO GAUGE HEADSPACE GAUGE STEEL
46.9 GBP 34 £46.90 * £48.90
In stock
Cartridge: 284 Winchester, 6 mm - 284 Winchester, 30/284 Winchester, 25/284 Winchester Color: Steel Height: 0.475'' Length: 1.976'' Material: Steel Model Number: 284 Winchster GO Style: Go Gauge Weight: 0.1 lbs Width: 0.475'' Product no.: 184100287
In stock
46.9 GBP 34 £46.90 * £48.90
Offer
Ensure precise and safe chamber work with the CLYMER 30-30 Winchester GO Headspace Gauge, a vital tool for accurate firearm maintenance and performance.
GO HEADSPACE GAUGES - 30-30 WINCHESTER GO GAUGE HEADSPACE GAUGE STEEL
46.9 GBP 16 £46.90 * £48.90
In stock
Cartridge: 30-30 Winchester, 219 Zipper, 25-35 Winchester, 7-30 Waters, 30 Herrett, 32 Winchester Special, 32-40 Winchester, 356 Winchester, 303 Savage, 307 Winchester, 219 Donaldson Wasp, 357 Herrett, 219 Zipper Improved Color: Steel Height: 0.4'' Length: 0.73'' Material: Steel Model Number: 30-30 Winchester GO Style: Go Gauge Weight: 0.1 lbs Width: 0.4'' Product no.: 184100300
In stock
46.9 GBP 16 £46.90 * £48.90
-8 %
Ensure precise chambering and safety with the CLYMER 300 Remington Ultra Magnum Go Gauge, a must-have tool for accurate gunsmithing and headspace measurement.
GO HEADSPACE GAUGES - 300 REMINGTON ULTRA MAGNUM GO GAUGE HEADSPACE GAUGE STEEL
54.9 GBP 1 £54.90 * £59.90
In stock
Cartridge: 300 Remington Ultra Magnum, 7 mm Remington Ultra Magnum Color: Steel Height: 0.52'' Length: 2.618'' Material: Steel Model Number: 300 Rem Ultra Magnum GO Style: Go Gauge Weight: 0.2 lbs Width: 0.52'' Product no.: 184100306
In stock
54.9 GBP 1 £54.90 * £59.90
Offer
Ensure safe chamber dimensions with CLYMER Go Headspace Gauges, precision machined from hardened steel for durability and accuracy across various calibers.
GO HEADSPACE GAUGES - 30-06 SPRINGFIELD GO GAUGE HEADSPACE GAUGE STEEL
46.9 GBP 20 £46.90 * £48.90
In stock
Cartridge: 30-06 Springfield, 270 Winchester, 25-06 Remington, 338-06, 35 Whelen, 8 mm-06 Color: Steel Height: 0.445'' Length: 2.291'' Material: Steel Model Number: 30-06 Springfield GO Style: Go Gauge Weight: 0.2 lbs Width: 0.445'' Product no.: 184100310
In stock
46.9 GBP 20 £46.90 * £48.90
Offer
Ensure safe chambering with Clymer Go Headspace Gauges, precision-engineered from hardened steel for accuracy, durability, and a wide range of calibers.
GO HEADSPACE GAUGES - 45-70 GOVERNMENT GO GAUGE HEADSPACE GAUGE STEEL
46.9 GBP 14 £46.90 * £48.90
In stock
Cartridge: 45-70 Government, 348 Winchester, 33 WCF, 40-65 Winchester Color: Steel Height: 0.495'' Length: 0.73'' Material: Steel Model Number: 45-70 Government GO Style: Go Gauge Weight: 0.1 lbs Width: 0.495'' Product no.: 184100330
In stock
46.9 GBP 14 £46.90 * £48.90
Offer
Ensure safe chamber dimensions with Clymer Go Headspace Gauges, precision-machined from hardened steel for reliability across various calibers.
GO HEADSPACE GAUGES - 357 MAGNUM GO GAUGE HEADSPACE GAUGE STEEL
46.9 GBP 4 £46.90 * £48.90
In stock
Cartridge: 357 Magnum, 38 Special Color: Steel Height: 0.375'' Length: 0.73'' Material: Steel Model Number: 357 Magnum GO Style: Go Gauge Weight: 0.1 lbs Width: 0.375'' Product no.: 184100380
In stock
46.9 GBP 4 £46.90 * £48.90
Offer
Ensure precise chamber work with the CLYMER .38 Super GO Headspace Gauge, crafted from durable steel for reliable measurements and enhanced safety.
GO HEADSPACE GAUGES - 38 SUPER GO GAUGE HEADSPACE GAUGE STEEL
46.9 GBP 33 £46.90 * £48.90
In stock
Cartridge: 38 Super Color: Steel Height: 0.38'' Length: 0.93'' Material: Steel Model Number: 38 Super GO Style: Go Gauge Weight: 0.1 lbs Width: 0.38'' Product no.: 184100390
In stock
46.9 GBP 33 £46.90 * £48.90
Offer
The CLYMER .40 S&W GO Headspace Gauge ensures precise measurements for safe chamber work, making it an essential tool for any serious gunsmith.
GO HEADSPACE GAUGES - 40 S&W GO GAUGE HEADSPACE GAUGE STEEL
46.9 GBP 10 £46.90 * £48.90
In stock
Cartridge: 40 S&W Color: Steel Height: 0.42'' Length: 0.873'' Material: Steel Model Number: 40 S&W GO Style: Go Gauge Weight: 0.1 lbs Width: 0.42'' Product no.: 184100400
In stock
46.9 GBP 10 £46.90 * £48.90
Offer
Ensure precision and safety in your chamber work with the CLYMER .44 Magnum GO Headspace Gauge, a must-have tool for any serious gunsmith.
GO HEADSPACE GAUGES - 44 MAGNUM GO GAUGE HEADSPACE GAUGE STEEL
46.9 GBP 7 £46.90 * £48.90
In stock
Cartridge: 44 Magnum, 44 Special Color: Steel Height: 0.45'' Length: 0.73'' Material: Steel Model Number: 44 Magnum GO Style: Go Gauge Weight: 0.1 lbs Width: 0.45'' Product no.: 184100430
In stock
46.9 GBP 7 £46.90 * £48.90
Offer
Ensure precise chambering and safety with the CLYMER .45 ACP GO Headspace Gauge, an essential tool for accurate gunsmithing and firearm maintenance.
GO HEADSPACE GAUGES - 45 ACP GO GAUGE HEADSPACE GAUGE STEEL
46.9 GBP 5 £46.90 * £48.90
In stock
Cartridge: 45 Auto (ACP) Color: Steel Height: 0.47'' Length: 0.93'' Material: Steel Model Number: 45 ACP GO Style: Go Gauge Weight: 0.1 lbs Width: 0.47'' Product no.: 184100450
In stock
46.9 GBP 5 £46.90 * £48.90
Clymer Go Headspace Gauges ensure precise measurement of minimum safe chamber dimensions, crafted from durable steel to enhance safety and reliability in firearms.
GO HEADSPACE GAUGES - 7.62X39MM GO GAUGE HEADSPACE GAUGE STEEL
Cartridge: 7.62 x 39 mm Russian Color: Steel Height: 0.4'' Length: 1.495'' Material: Steel Model Number: 7.62x39mm Go Style: Go Gauge Weight: 0.1 lbs Width: 0.4'' Product no.: 184100490
Ensure precise and safe chamber work with the CLYMER 7.62x54R GO Headspace Gauge, a must-have tool for accurate firearm maintenance and performance.
GO HEADSPACE GAUGES - 7.62X54R GO GAUGE HEADSPACE GAUGE STEEL
Cartridge: 7.62 x 54 mm Russian Color: Steel Height: 0.47'' Length: 0.73'' Material: Steel Model Number: 7.62x54R GO Style: Go Gauge Weight: 0.1 lbs Width: 0.47'' Product no.: 184100500
Ensure precise and safe chamber work with the CLYMER .45 Colt GO Headspace Gauge, crafted from durable steel for reliable measurements every time.
GO HEADSPACE GAUGES - 45 LONG COLT GO GAUGE HEADSPACE GAUGE STEEL
Cartridge: 45 (Long) Colt Color: Steel Height: 0.51'' Length: 0.73'' Material: Steel Model Number: 45 Long Colt Go Style: Go Gauge Weight: 0.1 lbs Width: 0.51'' Product no.: 184100510
Ensure precise chamber work with the CLYMER 12 Gauge GO Headspace Gauge, crafted from durable steel for safety and accuracy in your firearms.
GO HEADSPACE GAUGES - 12 GAUGE GO GAUGE HEADSPACE GAUGE STEEL
Cartridge: 12 Gauge Color: Steel Height: 0.788'' Length: 1.26'' Material: Steel Model Number: 12 Gauge Go Style: Go Gauge Weight: 0.2 lbs Width: 0.788'' Product no.: 184110120
Ensure precision and safety in your chamber work with the CLYMER 20 Gauge GO Headspace Gauge, crafted from durable steel for reliable performance.
GO HEADSPACE GAUGES - 20 GAUGE GO GAUGE HEADSPACE GAUGE STEEL
Cartridge: 20 Gauge Color: Steel Height: 0.68'' Length: 1.25'' Material: Steel Model Number: 20 Gauge Go Style: Go Gauge Weight: 0.2 lbs Width: 0.68'' Product no.: 184110200
Ensure safe chambering with Clymer Go Headspace Gauges, precision-machined from durable steel to meet SAAMI specs, available in various calibers for versatile use.
GO HEADSPACE GAUGES - 204 RUGER GO GAUGE HEADSPACE GAUGE STEEL
Cartridge: 204 Ruger Color: Steel Height: 0.355'' Length: 1.686'' Material: Steel Model Number: 204 Ruger Go Style: Go Gauge Weight: 0.1 lbs Width: 0.355'' Product no.: 184000033
Clymer Go Headspace Gauges ensure precise, reliable measurements for safe chambering, with durable steel construction and a wide range of calibers for versatile use.
GO HEADSPACE GAUGES - 300 AAC BLACKOUT GO HEADSPACE GAUGE STEEL
Cartridge: 300 AAC Blackout Color: Steel Height: 0.365'' Length: 1.287'' Material: Steel Model Number: 300 Blackout Go Style: Go Gauge Weight: 0.1 lbs Width: 0.365'' Product no.: 100011283
Ensure safe chamber dimensions with Clymer Go Headspace Gauges, precision-machined from hardened steel for accuracy, durability, and a wide range of calibers.
GO HEADSPACE GAUGES - 224 VALKYRIE GO GAUGE HEADSPACE GAUGE STEEL
Cartridge: 224 Valkyrie Color: Steel Height: 0.415'' Length: 1.37'' Material: Steel Model Number: 224 Valkyrie GO Style: Go Gauge Weight: 0.1 lbs Width: 0.415'' Product no.: 184000077
Clymer Go Headspace Gauges ensure precise chamber dimensions for safety, crafted from durable steel, and available in various calibers for versatile gunsmithing.
GO HEADSPACE GAUGES - 6.5MM CREEDMOOR GO HEADSPACE GAUGE STEEL
Cartridge: 6.5 Creedmoor Color: Steel Height: 0.465'' Length: 1.7'' Material: Steel Model Number: 6.5 Creedmoor Go Style: Go Gauge Weight: 0.1 lbs Width: 0.465'' Product no.: 184000079
Ensure safe firearm operation with Clymer Go Headspace Gauges, precision-crafted from hardened steel to meet SAAMI specs, available in various calibers.
GO HEADSPACE GAUGES - 300 WSM GO GAUGE HEADSPACE GAUGE STEEL
Cartridge: 300 WSM (Winchester Short Mag), 270 WSM (Winchester Short Mag), 325 WSM (Winchester Short Mag) Color: Steel Height: 0.53'' Length: 1.885'' Material: Steel Model Number: 300 WSM GO Style: Go Gauge Weight: 0.2 lbs Width: 0.53'' Product no.: 184100263
Ensure precise and safe chamber work with the CLYMER 6.5x55mm Swede GO Headspace Gauge, an essential tool for accurate firearm maintenance.
GO HEADSPACE GAUGES - 6.5X55MM SWEDE GO GAUGE HEADSPACE GAUGE STEEL
Cartridge: 6.5 x 55 mm Swedish Mauser Color: Steel Height: 0.43'' Length: 1.952'' Material: Steel Model Number: 6.5x55mm Swede GO Style: Go Gauge Weight: 0.1 lbs Width: 0.43'' Product no.: 184100290
Ensure safe chamber dimensions with Clymer Go Headspace Gauges, precision-crafted from hardened steel for accuracy across multiple calibers, perfect for gunsmithing.
GO HEADSPACE GAUGES - BELTED MAGNUM GO GAUGE HEADSPACE GAUGE STEEL
Cartridge: 300 Winchester Magnum, 375 H&H Magnum, 350 Remington Mag Color: Steel Height: 0.48'' Length: 0.94'' Material: Steel Model Number: Belted Magnum GO Style: Go Gauge Weight: 0.1 lbs Width: 0.48'' Product no.: 184100320
Clymer Go Headspace Gauges ensure precise chamber measurements, durable steel construction, and a wide range of calibers for safe and reliable firearm assembly.
GO HEADSPACE GAUGES - 30 M1 CARBINE GO GAUGE HEADSPACE GAUGE STEEL
Cartridge: 30 Carbine Color: Steel Height: 0.335'' Length: 1.3'' Material: Steel Model Number: 30 M1 Carbine GO Style: Go Gauge Weight: 0.1 lbs Width: 0.335'' Product no.: 184100350
Clymer Go Headspace Gauges ensure precision and safety in chamber work, crafted from durable steel to meet SAAMI specs, available in various calibers.
GO HEADSPACE GAUGES - 6MM REMINGTON GO GAUGE HEADSPACE GAUGE STEEL
Cartridge: 6 mm Remington Color: Steel Height: 0.53'' Length: 1.885'' Material: Steel Model Number: 6mm Remingotn GO Style: Go Gauge Weight: 0.2 lbs Width: 0.53'' Product no.: 184100270
Ensure accurate and safe chambering with Clymer Go Headspace Gauges, crafted from durable steel to precise SAAMI specs for various calibers.
GO HEADSPACE GAUGES - 25-20 WINCHESTER GO GAUGE
Cartridge: 218 Bee, 25-20 Winchester, 32-20 Winchester, 218 Mashburn Bee Color: Steel Material: Steel Model Number: 25-20 Winchester GO Style: Go Gauge Product no.: 184100360
46.9 69.9 36 GBP
Offer
MSRP £48.90
46.9 GBP £46.90

Prices inclusive of duty & VAT.

Product no.: 184100302

Mfr. No.: GO3040KRAG

GO, .30-40 Krag; .303 British
In stock 4 pcs. in the USA warehouse
3.5/5 - 6 Customers
1
2
3
4
5
6
7
8
9
10+
Offer
MSRP £48.90
£46.90

Prices inclusive of duty & VAT.

1
2
3
4
5
6
7
8
9
10+

Delivery time approx. 7-14 days.

100-Day Return Policy

Delivery time approx. 7-14 days.

100-Day Return Policy
No charges until we ship
No charge:
Your credit card will not be charged when you place your order.

No commitments:
You are under no obligation until the goods are shipped. You can cancel your order at any time before shipping - free of charge.

Not until shipping:
Your credit card will only be charged once we ship your order. Not before.
  • Ensures accurate chamber measurements
  • Essential for safe firearm use
  • Compatible with .30-40 Krag
Wish List Ask question
46.9 69.9 36 GBP
Description Specification Customers reviews Accessories

CLYMER 30-40 KRAG GO GAUGE HEADSPACE GAUGE STEEL

Offer
MSRP £48.90
46.9 GBP £46.90

Prices inclusive of duty & VAT.

1
2
3
4
5
6
7
8
9
10+
Offer
MSRP £48.90
£46.90

Prices inclusive of duty & VAT.

1
2
3
4
5
6
7
8
9
10+

Delivery time approx. 7-14 days.

100-Day Return Policy

Description:

Ensure Precision and Safety in Your Chamber Work

The CLYMER GO Headspace Gauges are an indispensable tool for gunsmiths and firearm enthusiasts alike. Designed specifically for the .30-40 Krag and .303 British cartridges, these gauges guarantee accuracy and safety during chamber work.

Product Features:

  • Type: GO Gauge
  • Cartridge Compatibility: .30-40 Krag; .303 British
  • Material: Durable Steel
  • Essential for: Accurate headspace measurement

Using the CLYMER GO Headspace Gauge ensures that your firearm operates safely and efficiently. Whether you are a professional gunsmith or a passionate hobbyist, this tool is absolutely essential for achieving the perfect chamber fit.



Attributes

  • Cartridge: 
    303 British
    , 
    30-40 Krag
  • Colour: 
    Steel
  • Height: 
    0.44''
  • Length: 
    0.73''
  • Material: 
    Steel
  • Model Number: 
    30-40 Krag GO
  • Style: 
    Go Gauge
  • Weight: 
    0.1 lbs
  • Width: 
    0.44''
  • Delivery weight: 0.014kg
  • Shipping height: 15mm
  • Shipping width: 18mm
  • Shipping length: 58mm

Item details

Made in USA

Customers reviews

Customer ratings (6)

3.5 / 5
Definitely recommended

Brownells USA No Problems 30/03/2017

works as advertized.

Definitely recommended

Brownells USA Safety First 09/03/2017

I purchase this Gauge after trying to locate a gunsmith near where I lived and worked to check the head space on my AR build. It was cheaper than a 2-3 hour drive and it work as it was designed.

Variations:

Offer
Ensure precise chamber work with the CLYMER 30-40 Krag GO Gauge, designed for accuracy and safety in firearms, compatible with .303 British.
GO HEADSPACE GAUGES - 30-40 KRAG GO GAUGE HEADSPACE GAUGE STEEL
46.9 GBP 4 £46.90 * £48.90
In stock
Cartridge: 30-40 Krag, 303 British Color: Steel Height: 0.44'' Length: 0.73'' Material: Steel Model Number: 30-40 Krag GO Style: Go Gauge Weight: 0.1 lbs Width: 0.44'' Product no.: 184100302
In stock
46.9 GBP 4 £46.90 * £48.90
-9 %
Ensure precision and safety in your chamber work with the CLYMER 5.56x45mm NATO GO Headspace Gauge, a must-have tool for every gunsmith.
GO HEADSPACE GAUGES - 5.56X45MM NATO GO GAUGE HEADSPACE GAUGE STEEL
49.9 GBP 3 £49.90 * £54.90
In stock
Cartridge: 5.56 mm NATO Color: Steel Height: 0.355'' Length: 1.623'' Material: Steel Model Number: 5.56x45mm NATO GO Style: Go Gauge Weight: 0.1 lbs Width: 0.355'' Product no.: 184000035
In stock
49.9 GBP 3 £49.90 * £54.90
Offer
Ensure safe chambering with Clymer Go Headspace Gauges, precision-crafted from hardened steel, available in various calibers for reliable gunsmithing.
GO HEADSPACE GAUGES - 22 LONG RIFLE GO GAUGE HEADSPACE GAUGE STEEL
46.9 GBP 2 £46.90 * £48.90
In stock
Cartridge: 22 Long Rifle, 22 Short, 22 Long, 22 Bentz, 22 Match Color: Steel Height: 0.284'' Length: 0.75'' Material: Steel Model Number: 22 Long Rifle Go Style: Go Gauge Weight: 0.1 lbs Width: 0.284'' Product no.: 184100220
In stock
46.9 GBP 2 £46.90 * £48.90
Offer
Ensure precision and safety in your chamber work with CLYMER's 6mm BR GO Headspace Gauge, designed for .22 Rem BR, 6mm BR, and 7mm BR calibers.
GO HEADSPACE GAUGES - 6MM BR GO GAUGE HEADSPACE GAUGE STEEL
46.9 GBP 14 £46.90 * £48.90
In stock
Cartridge: 7 mm BR (Benchrest) Remington, 22 BR (Benchrest) Remington, 6 mm BR Color: Steel Height: 0.46'' Length: 1.317'' Material: Steel Model Number: 6mm BR GO Style: Go Gauge Weight: 0.1 lbs Width: 0.46'' Product no.: 184100222
In stock
46.9 GBP 14 £46.90 * £48.90
Offer
Ensure precision and safety in your chamber work with the CLYMER GO Headspace Gauges, specifically designed for .22 Rimfire Mag and .22RFM.
GO HEADSPACE GAUGES - 22 WRF GO GAUGE HEADSPACE GAUGE STEEL
47.9 GBP 18 £47.90 * £49.90
In stock
Cartridge: 17 HMR, 22 WRF, 22 RF Color: Steel Height: 0.284'' Length: 0.75'' Material: Steel Model Number: 22 WRF GO Style: Go Gauge Weight: 0.1 lbs Width: 0.284'' Product no.: 184100230
In stock
47.9 GBP 18 £47.90 * £49.90
Offer
Ensure safe chambering with Clymer Go Headspace Gauges, precision machined from hardened steel for durability and accuracy across various calibers.
GO HEADSPACE GAUGES - 22 HORNET GO GAUGE HEADSPACE GAUGE STEEL
46.9 GBP 17 £46.90 * £48.90
In stock
Cartridge: 22 Hornet, 17 Hornet Color: Steel Height: 0.284'' Length: 0.75'' Material: Steel Model Number: 22 Hornet GO Style: Go Gauge Weight: 0.1 lbs Width: 0.284'' Product no.: 184100235
In stock
46.9 GBP 17 £46.90 * £48.90
Offer
Ensure firearm safety with Clymer Go Headspace Gauges, precision-engineered from hardened steel for accurate measurements across various calibers.
GO HEADSPACE GAUGES - 223 REMINGTON GO GAUGE HEADSPACE GAUGE STEEL
46.9 GBP 20 £46.90 * £48.90
In stock
Cartridge: 223 Remington, 6 mm x 45 Color: Steel Height: 0.355'' Length: 1.623'' Material: Steel Model Number: 223 Remington GO Style: Go Gauge Weight: 0.1 lbs Width: 0.355'' Product no.: 184100240
In stock
46.9 GBP 20 £46.90 * £48.90
Offer
Ensure precise chamber measurements with the CLYMER 22-250 Remington GO Headspace Gauge, essential for safe and accurate gunsmithing.
GO HEADSPACE GAUGES - 22-250 REMINGTON GO GAUGE HEADSPACE GAUGE STEEL
46.9 GBP 2 £46.90 * £48.90
In stock
Cartridge: 22-250 Remington Color: Steel Height: 0.405'' Length: 1.733'' Material: Steel Model Number: 22-250 Remington GO Style: Go Gauge Weight: 0.1 lbs Width: 0.405'' Product no.: 184100250
In stock
46.9 GBP 2 £46.90 * £48.90
Offer
Ensure safe and accurate chamber work with Clymer Go Headspace Gauges, crafted from durable steel to meet SAAMI specs for various calibers.
GO HEADSPACE GAUGES - 250 SAVAGE GO GAUGE HEADSPACE GUAGE STEEL
46.9 GBP 10 £46.90 * £48.90
In stock
Cartridge: 250 Savage Color: Steel Height: 0.45'' Length: 1.722'' Material: Steel Model Number: 250 Savage GO Style: Go Gauge Weight: 0.1 lbs Width: 0.45'' Product no.: 184100255
In stock
46.9 GBP 10 £46.90 * £48.90
Offer
Clymer Go Headspace Gauges ensure precise chamber measurements, durable steel construction, and a wide range of calibers for safe, reliable firearm work.
GO HEADSPACE GAUGES - 308 WINCHESTER GO GAUGE HEADSPACE GAUGE STEEL
46.9 GBP 2 £46.90 * £48.90
In stock
Cartridge: 308 Winchester, 243 Winchester, 7 mm - 08 Remington, 358 Winchester, 260 Remington Color: Steel Height: 0.45'' Length: 1.722'' Material: Steel Model Number: 308 Winchester GO Style: Go Gauge Weight: 0.1 lbs Width: 0.45'' Product no.: 184100260
In stock
46.9 GBP 2 £46.90 * £48.90
Offer
CLYMER Go Headspace Gauges ensure precision and safety in chamber work, crafted from durable steel to meet SAAMI specs and available in various calibers.
GO HEADSPACE GAUGES - 7MM MAUSER GO GAUGE HEADSPACE GAUGE STEEL
46.9 GBP 7 £46.90 * £48.90
In stock
Cartridge: 257 Roberts, 7 mm Mauser (7 x 57 mm Mauser) Color: Steel Height: 0.43'' Length: 1.952'' Material: Steel Model Number: 7mm Mauser GO Style: Go Gauge Weight: 0.1 lbs Width: 0.43'' Product no.: 184100280
In stock
46.9 GBP 7 £46.90 * £48.90
Offer
The CLYMER .284 Winchester GO Headspace Gauge ensures precise chamber measurements, enhancing safety and accuracy in your firearm work.
GO HEADSPACE GAUGES - 284 WINCHESTER GO GAUGE HEADSPACE GAUGE STEEL
46.9 GBP 34 £46.90 * £48.90
In stock
Cartridge: 284 Winchester, 6 mm - 284 Winchester, 30/284 Winchester, 25/284 Winchester Color: Steel Height: 0.475'' Length: 1.976'' Material: Steel Model Number: 284 Winchster GO Style: Go Gauge Weight: 0.1 lbs Width: 0.475'' Product no.: 184100287
In stock
46.9 GBP 34 £46.90 * £48.90
Offer
Ensure precise and safe chamber work with the CLYMER 30-30 Winchester GO Headspace Gauge, a vital tool for accurate firearm maintenance and performance.
GO HEADSPACE GAUGES - 30-30 WINCHESTER GO GAUGE HEADSPACE GAUGE STEEL
46.9 GBP 16 £46.90 * £48.90
In stock
Cartridge: 30-30 Winchester, 219 Zipper, 25-35 Winchester, 7-30 Waters, 30 Herrett, 32 Winchester Special, 32-40 Winchester, 356 Winchester, 303 Savage, 307 Winchester, 219 Donaldson Wasp, 357 Herrett, 219 Zipper Improved Color: Steel Height: 0.4'' Length: 0.73'' Material: Steel Model Number: 30-30 Winchester GO Style: Go Gauge Weight: 0.1 lbs Width: 0.4'' Product no.: 184100300
In stock
46.9 GBP 16 £46.90 * £48.90
-8 %
Ensure precise chambering and safety with the CLYMER 300 Remington Ultra Magnum Go Gauge, a must-have tool for accurate gunsmithing and headspace measurement.
GO HEADSPACE GAUGES - 300 REMINGTON ULTRA MAGNUM GO GAUGE HEADSPACE GAUGE STEEL
54.9 GBP 1 £54.90 * £59.90
In stock
Cartridge: 300 Remington Ultra Magnum, 7 mm Remington Ultra Magnum Color: Steel Height: 0.52'' Length: 2.618'' Material: Steel Model Number: 300 Rem Ultra Magnum GO Style: Go Gauge Weight: 0.2 lbs Width: 0.52'' Product no.: 184100306
In stock
54.9 GBP 1 £54.90 * £59.90
Offer
Ensure safe chamber dimensions with CLYMER Go Headspace Gauges, precision machined from hardened steel for durability and accuracy across various calibers.
GO HEADSPACE GAUGES - 30-06 SPRINGFIELD GO GAUGE HEADSPACE GAUGE STEEL
46.9 GBP 20 £46.90 * £48.90
In stock
Cartridge: 30-06 Springfield, 270 Winchester, 25-06 Remington, 338-06, 35 Whelen, 8 mm-06 Color: Steel Height: 0.445'' Length: 2.291'' Material: Steel Model Number: 30-06 Springfield GO Style: Go Gauge Weight: 0.2 lbs Width: 0.445'' Product no.: 184100310
In stock
46.9 GBP 20 £46.90 * £48.90
Offer
Ensure safe chambering with Clymer Go Headspace Gauges, precision-engineered from hardened steel for accuracy, durability, and a wide range of calibers.
GO HEADSPACE GAUGES - 45-70 GOVERNMENT GO GAUGE HEADSPACE GAUGE STEEL
46.9 GBP 14 £46.90 * £48.90
In stock
Cartridge: 45-70 Government, 348 Winchester, 33 WCF, 40-65 Winchester Color: Steel Height: 0.495'' Length: 0.73'' Material: Steel Model Number: 45-70 Government GO Style: Go Gauge Weight: 0.1 lbs Width: 0.495'' Product no.: 184100330
In stock
46.9 GBP 14 £46.90 * £48.90
Offer
Ensure safe chamber dimensions with Clymer Go Headspace Gauges, precision-machined from hardened steel for reliability across various calibers.
GO HEADSPACE GAUGES - 357 MAGNUM GO GAUGE HEADSPACE GAUGE STEEL
46.9 GBP 4 £46.90 * £48.90
In stock
Cartridge: 357 Magnum, 38 Special Color: Steel Height: 0.375'' Length: 0.73'' Material: Steel Model Number: 357 Magnum GO Style: Go Gauge Weight: 0.1 lbs Width: 0.375'' Product no.: 184100380
In stock
46.9 GBP 4 £46.90 * £48.90
Offer
Ensure precise chamber work with the CLYMER .38 Super GO Headspace Gauge, crafted from durable steel for reliable measurements and enhanced safety.
GO HEADSPACE GAUGES - 38 SUPER GO GAUGE HEADSPACE GAUGE STEEL
46.9 GBP 33 £46.90 * £48.90
In stock
Cartridge: 38 Super Color: Steel Height: 0.38'' Length: 0.93'' Material: Steel Model Number: 38 Super GO Style: Go Gauge Weight: 0.1 lbs Width: 0.38'' Product no.: 184100390
In stock
46.9 GBP 33 £46.90 * £48.90
Offer
The CLYMER .40 S&W GO Headspace Gauge ensures precise measurements for safe chamber work, making it an essential tool for any serious gunsmith.
GO HEADSPACE GAUGES - 40 S&W GO GAUGE HEADSPACE GAUGE STEEL
46.9 GBP 10 £46.90 * £48.90
In stock
Cartridge: 40 S&W Color: Steel Height: 0.42'' Length: 0.873'' Material: Steel Model Number: 40 S&W GO Style: Go Gauge Weight: 0.1 lbs Width: 0.42'' Product no.: 184100400
In stock
46.9 GBP 10 £46.90 * £48.90
Offer
Ensure precision and safety in your chamber work with the CLYMER .44 Magnum GO Headspace Gauge, a must-have tool for any serious gunsmith.
GO HEADSPACE GAUGES - 44 MAGNUM GO GAUGE HEADSPACE GAUGE STEEL
46.9 GBP 7 £46.90 * £48.90
In stock
Cartridge: 44 Magnum, 44 Special Color: Steel Height: 0.45'' Length: 0.73'' Material: Steel Model Number: 44 Magnum GO Style: Go Gauge Weight: 0.1 lbs Width: 0.45'' Product no.: 184100430
In stock
46.9 GBP 7 £46.90 * £48.90
Offer
Ensure precise chambering and safety with the CLYMER .45 ACP GO Headspace Gauge, an essential tool for accurate gunsmithing and firearm maintenance.
GO HEADSPACE GAUGES - 45 ACP GO GAUGE HEADSPACE GAUGE STEEL
46.9 GBP 5 £46.90 * £48.90
In stock
Cartridge: 45 Auto (ACP) Color: Steel Height: 0.47'' Length: 0.93'' Material: Steel Model Number: 45 ACP GO Style: Go Gauge Weight: 0.1 lbs Width: 0.47'' Product no.: 184100450
In stock
46.9 GBP 5 £46.90 * £48.90
Clymer Go Headspace Gauges ensure precise measurement of minimum safe chamber dimensions, crafted from durable steel to enhance safety and reliability in firearms.
GO HEADSPACE GAUGES - 7.62X39MM GO GAUGE HEADSPACE GAUGE STEEL
Cartridge: 7.62 x 39 mm Russian Color: Steel Height: 0.4'' Length: 1.495'' Material: Steel Model Number: 7.62x39mm Go Style: Go Gauge Weight: 0.1 lbs Width: 0.4'' Product no.: 184100490
Ensure precise and safe chamber work with the CLYMER 7.62x54R GO Headspace Gauge, a must-have tool for accurate firearm maintenance and performance.
GO HEADSPACE GAUGES - 7.62X54R GO GAUGE HEADSPACE GAUGE STEEL
Cartridge: 7.62 x 54 mm Russian Color: Steel Height: 0.47'' Length: 0.73'' Material: Steel Model Number: 7.62x54R GO Style: Go Gauge Weight: 0.1 lbs Width: 0.47'' Product no.: 184100500
Ensure precise and safe chamber work with the CLYMER .45 Colt GO Headspace Gauge, crafted from durable steel for reliable measurements every time.
GO HEADSPACE GAUGES - 45 LONG COLT GO GAUGE HEADSPACE GAUGE STEEL
Cartridge: 45 (Long) Colt Color: Steel Height: 0.51'' Length: 0.73'' Material: Steel Model Number: 45 Long Colt Go Style: Go Gauge Weight: 0.1 lbs Width: 0.51'' Product no.: 184100510
Ensure precise chamber work with the CLYMER 12 Gauge GO Headspace Gauge, crafted from durable steel for safety and accuracy in your firearms.
GO HEADSPACE GAUGES - 12 GAUGE GO GAUGE HEADSPACE GAUGE STEEL
Cartridge: 12 Gauge Color: Steel Height: 0.788'' Length: 1.26'' Material: Steel Model Number: 12 Gauge Go Style: Go Gauge Weight: 0.2 lbs Width: 0.788'' Product no.: 184110120
Ensure precision and safety in your chamber work with the CLYMER 20 Gauge GO Headspace Gauge, crafted from durable steel for reliable performance.
GO HEADSPACE GAUGES - 20 GAUGE GO GAUGE HEADSPACE GAUGE STEEL
Cartridge: 20 Gauge Color: Steel Height: 0.68'' Length: 1.25'' Material: Steel Model Number: 20 Gauge Go Style: Go Gauge Weight: 0.2 lbs Width: 0.68'' Product no.: 184110200
Ensure safe chambering with Clymer Go Headspace Gauges, precision-machined from durable steel to meet SAAMI specs, available in various calibers for versatile use.
GO HEADSPACE GAUGES - 204 RUGER GO GAUGE HEADSPACE GAUGE STEEL
Cartridge: 204 Ruger Color: Steel Height: 0.355'' Length: 1.686'' Material: Steel Model Number: 204 Ruger Go Style: Go Gauge Weight: 0.1 lbs Width: 0.355'' Product no.: 184000033
Clymer Go Headspace Gauges ensure precise, reliable measurements for safe chambering, with durable steel construction and a wide range of calibers for versatile use.
GO HEADSPACE GAUGES - 300 AAC BLACKOUT GO HEADSPACE GAUGE STEEL
Cartridge: 300 AAC Blackout Color: Steel Height: 0.365'' Length: 1.287'' Material: Steel Model Number: 300 Blackout Go Style: Go Gauge Weight: 0.1 lbs Width: 0.365'' Product no.: 100011283
Ensure safe chamber dimensions with Clymer Go Headspace Gauges, precision-machined from hardened steel for accuracy, durability, and a wide range of calibers.
GO HEADSPACE GAUGES - 224 VALKYRIE GO GAUGE HEADSPACE GAUGE STEEL
Cartridge: 224 Valkyrie Color: Steel Height: 0.415'' Length: 1.37'' Material: Steel Model Number: 224 Valkyrie GO Style: Go Gauge Weight: 0.1 lbs Width: 0.415'' Product no.: 184000077
Clymer Go Headspace Gauges ensure precise chamber dimensions for safety, crafted from durable steel, and available in various calibers for versatile gunsmithing.
GO HEADSPACE GAUGES - 6.5MM CREEDMOOR GO HEADSPACE GAUGE STEEL
Cartridge: 6.5 Creedmoor Color: Steel Height: 0.465'' Length: 1.7'' Material: Steel Model Number: 6.5 Creedmoor Go Style: Go Gauge Weight: 0.1 lbs Width: 0.465'' Product no.: 184000079
Ensure safe firearm operation with Clymer Go Headspace Gauges, precision-crafted from hardened steel to meet SAAMI specs, available in various calibers.
GO HEADSPACE GAUGES - 300 WSM GO GAUGE HEADSPACE GAUGE STEEL
Cartridge: 300 WSM (Winchester Short Mag), 270 WSM (Winchester Short Mag), 325 WSM (Winchester Short Mag) Color: Steel Height: 0.53'' Length: 1.885'' Material: Steel Model Number: 300 WSM GO Style: Go Gauge Weight: 0.2 lbs Width: 0.53'' Product no.: 184100263
Ensure precise and safe chamber work with the CLYMER 6.5x55mm Swede GO Headspace Gauge, an essential tool for accurate firearm maintenance.
GO HEADSPACE GAUGES - 6.5X55MM SWEDE GO GAUGE HEADSPACE GAUGE STEEL
Cartridge: 6.5 x 55 mm Swedish Mauser Color: Steel Height: 0.43'' Length: 1.952'' Material: Steel Model Number: 6.5x55mm Swede GO Style: Go Gauge Weight: 0.1 lbs Width: 0.43'' Product no.: 184100290
Ensure safe chamber dimensions with Clymer Go Headspace Gauges, precision-crafted from hardened steel for accuracy across multiple calibers, perfect for gunsmithing.
GO HEADSPACE GAUGES - BELTED MAGNUM GO GAUGE HEADSPACE GAUGE STEEL
Cartridge: 300 Winchester Magnum, 375 H&H Magnum, 350 Remington Mag Color: Steel Height: 0.48'' Length: 0.94'' Material: Steel Model Number: Belted Magnum GO Style: Go Gauge Weight: 0.1 lbs Width: 0.48'' Product no.: 184100320
Clymer Go Headspace Gauges ensure precise chamber measurements, durable steel construction, and a wide range of calibers for safe and reliable firearm assembly.
GO HEADSPACE GAUGES - 30 M1 CARBINE GO GAUGE HEADSPACE GAUGE STEEL
Cartridge: 30 Carbine Color: Steel Height: 0.335'' Length: 1.3'' Material: Steel Model Number: 30 M1 Carbine GO Style: Go Gauge Weight: 0.1 lbs Width: 0.335'' Product no.: 184100350
Clymer Go Headspace Gauges ensure precision and safety in chamber work, crafted from durable steel to meet SAAMI specs, available in various calibers.
GO HEADSPACE GAUGES - 6MM REMINGTON GO GAUGE HEADSPACE GAUGE STEEL
Cartridge: 6 mm Remington Color: Steel Height: 0.53'' Length: 1.885'' Material: Steel Model Number: 6mm Remingotn GO Style: Go Gauge Weight: 0.2 lbs Width: 0.53'' Product no.: 184100270
Ensure accurate and safe chambering with Clymer Go Headspace Gauges, crafted from durable steel to precise SAAMI specs for various calibers.
GO HEADSPACE GAUGES - 25-20 WINCHESTER GO GAUGE
Cartridge: 218 Bee, 25-20 Winchester, 32-20 Winchester, 218 Mashburn Bee Color: Steel Material: Steel Model Number: 25-20 Winchester GO Style: Go Gauge Product no.: 184100360

Customers also bought

Alternative items

Oops! Something went wrong.

We encountered an error while loading this content. Please refresh the page to continue. If the issue persists, contact our customer support.

Site Navigation
Product Categories
Ordering
Customer Service

Welcome!

to Brownells UK, your destination for anything gun related. With our roots in a genuine passion for firearms, we bring you an unmatched selection of Gun Parts, Firearm Accessories, Gunsmithing Tools, Scopes & Red Dot Sights and Expert Knowledge.

Whether you're looking to maintain, repair, or upgrade, we've got what you need!

For Shooters, By Shooters
We share your enthusiasm and know exactly what you're looking for because we're part of the community.

Massive Selection
From the essentials to the unique, find everything under one roof.

Our blend of tradition and innovation
Shop with the convenience of modern technology, backed by a legacy of experience.

Browse our collection and discover why we're the trusted name in shooting sports & hunting.

Brownells Norge - Komplett utvalg av ladeutstyr, våpendeler, kuler, hylser, kikkerter, optikk og luftvåpen Brownells Österreich - Einer der größten Lieferanten für Waffenteile, Büchsenmacherzubehör & Schießsportzubehör Brownells Switzerland - Einer der größten Lieferanten für Waffenteile, Büchsenmacherzubehör & Schießsportzubehör Brownells Deutschland - Einer der größten Lieferanten für Waffenteile, Büchsenmacherzubehör & Schießsportzubehör Brownells France - Le plus grand fournisseur d'Accessoires pour le tir, Pièces détachées & Outils d'Armurier Brownells Iberica - El mayor proveedor de accesorios para el Tiro, Piezas y herramientas del armero. Brownells Sverige - Världens största leverantör av Vapendelar, Vapensmide Verktyg & Skyttetillbehör Brownells Suomi Brownells Italia - Il negozio del più grande rivenditore di componenti e accessori per armi da tiro, difesa e caccia Brownells Polska - Największy na świecie dostawca części broni, narzędzi rusznikarskich & akcesoriów strzeleckich Brownells Česko - Největší světový dodavatel součástí zbraní, střeleckého příslušenství a zbrojního nářadí
*
Prices inclusive of duty & VAT.

© 2025 Brownells UK
Part of the Brownells Europe Group

Logo Brownells
Classical viewClassical view Mobile viewMobile view
Back to top