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Achieve precise cartridge headspace and bullet measurements with SAC's durable, corrosion-resistant 17-4 Stainless Steel inserts for the Modular Headspace Comparator.

SHORT ACTION CUSTOMS 6MM X 40° W/.273" NECK MODULAR HEADSPACE COMPARATOR INSERT

100050139
Variations
Filters:
Variations:

Variations:

Cartridge: 243/6 mm (.243) Product no.: 100050139
Not available
41.22 GBP 0 £41.22 *
-13 %
22 CALIBER X 28° MODULAR HEADSPACE COMPARATOR INSERT
47.9 GBP 2 £47.90 * £54.90 You save £7.00
In stock
Cartridge: 22 Caliber (.223-.224) Product no.: 100050131
In stock
47.9 GBP 2 £47.90 * £54.90
-13 %
22 CALIBER X 30° MODULAR HEADSPACE COMPARATOR INSERT
47.9 GBP 2 £47.90 * £54.90 You save £7.00
In stock
Cartridge: 22 Caliber (.223-.224) Product no.: 100050130
In stock
47.9 GBP 2 £47.90 * £54.90
-13 %
25 CALIBER X 30° MODULAR HEADSPACE COMPARATOR INSERT
47.9 GBP 2 £47.90 * £54.90 You save £7.00
In stock
Cartridge: 25 Caliber (.251) Product no.: 100050133
In stock
47.9 GBP 2 £47.90 * £54.90
-13 %
30 CALIBER X 20° MODULAR HEADSPACE COMPARATOR INSERT
47.9 GBP 2 £47.90 * £54.90 You save £7.00
In stock
Cartridge: 30 Caliber (.308) Product no.: 100050157
In stock
47.9 GBP 2 £47.90 * £54.90
-13 %
30 CALIBER X 35° MODULAR HEADSPACE COMPARATOR INSERT
47.9 GBP 2 £47.90 * £54.90 You save £7.00
In stock
Cartridge: 30 Caliber (.308) Product no.: 100050155
In stock
47.9 GBP 2 £47.90 * £54.90
-13 %
204 RUGER MODULAR HEADSPACE COMPARATOR INSERT
47.9 GBP 1 £47.90 * £54.90 You save £7.00
In stock
Cartridge: 204 Ruger Product no.: 100050132
In stock
47.9 GBP 1 £47.90 * £54.90
-13 %
30-06 SPRINGFIELD MODULAR HEADSPACE COMPARATOR INSERT
47.9 GBP 2 £47.90 * £54.90 You save £7.00
In stock
Cartridge: 30-06 Springfield Product no.: 100050163
In stock
47.9 GBP 2 £47.90 * £54.90
-13 %
300 BLACKOUT MODULAR HEADSPACE COMPARATOR INSERT
47.9 GBP 3 £47.90 * £54.90 You save £7.00
In stock
Cartridge: 300 AAC Blackout Product no.: 100050159
In stock
47.9 GBP 3 £47.90 * £54.90
-13 %
300 WINCHESTER MAGNUM MODULAR HEADSPACE COMPARATOR INSERT
47.9 GBP 1 £47.90 * £54.90 You save £7.00
In stock
Cartridge: 300 Winchester Magnum Product no.: 100050162
In stock
47.9 GBP 1 £47.90 * £54.90
-13 %
375 CHEYTAC MODULAR HEADSPACE COMPARATOR INSERT
47.9 GBP 2 £47.90 * £54.90 You save £7.00
In stock
Cartridge: 375 Cheytac Product no.: 100050170
In stock
47.9 GBP 2 £47.90 * £54.90
-13 %
6.5MM X 20° MODULAR HEADSPACE COMPARATOR INSERT
47.9 GBP 2 £47.90 * £54.90 You save £7.00
In stock
Cartridge: 264/6.5 mm (.264) Product no.: 100050143
In stock
47.9 GBP 2 £47.90 * £54.90
-13 %
6.5X55 SWED MODULAR HEADSPACE COMPARATOR INSERT
47.9 GBP 2 £47.90 * £54.90 You save £7.00
In stock
Cartridge: 6.5 x 55 mm Swedish Mauser Product no.: 100050147
In stock
47.9 GBP 2 £47.90 * £54.90
-13 %
6MM X 20° MODULAR HEADSPACE COMPARATOR INSERT
47.9 GBP 2 £47.90 * £54.90 You save £7.00
In stock
Cartridge: 243/6 mm (.243) Product no.: 100050137
In stock
47.9 GBP 2 £47.90 * £54.90
-13 %
6MM X 30° MODULAR HEADSPACE COMPARATOR INSERT
47.9 GBP 4 £47.90 * £54.90 You save £7.00
In stock
Cartridge: 243/6 mm (.243) Product no.: 100050136
In stock
47.9 GBP 4 £47.90 * £54.90
-10 %
7MM REMINGTON MAGNUM MODULAR HEADSPACE COMPARATOR INSERT
44.9 GBP 2 £44.90 * £49.90 You save £5.00
In stock
Cartridge: 7 mm Remington Magnum Product no.: 100050151
In stock
44.9 GBP 2 £44.90 * £49.90
-13 %
7MM X 40° MODULAR HEADSPACE COMPARATOR INSERT
47.9 GBP 1 £47.90 * £54.90 You save £7.00
In stock
Cartridge: 7 mm Product no.: 100050153
In stock
47.9 GBP 1 £47.90 * £54.90
6.5MM X 30° MODULAR HEADSPACE COMPARATOR INSERT
54.9 GBP 0 £54.90 *
Backorderable
Cartridge: 264/6.5 mm (.264) Product no.: 100050142
Backorderable
54.9 GBP 0 £54.90 *
Cartridge: 22 Caliber (.223-.224) Product no.: 100050171
Not available
37.6 GBP 0 £37.60 *
Cartridge: 22 Caliber (.223-.224) Product no.: 100050135
Not available
37.58 GBP 0 £37.58 *
Cartridge: 223 Remington Product no.: 100050134
Not available
37.58 GBP 0 £37.58 *
44.9 54.9 43 GBP

Not available.

Product no.: 100050139

Mfr. No.: SAC-64073HSC

Notify on availability 41.22 GBP
44.9 54.9 43 GBP
Description Specification Customers reviews Accessories

SHORT ACTION CUSTOMS 6MM X 40° W/.273" NECK MODULAR HEADSPACE COMPARATOR INSERT

Notify on availability

Description:

Enhance your precision with the MODULAR HEADSPACE COMPARATOR INSERTS!

Introducing the MODULAR HEADSPACE COMPARATOR INSERTS from SHORT ACTION CUSTOMS—the ultimate solution for accurate cartridge headspace and bullet measurements.

Product Features:

  • Designed for use with the Modular Headspace Comparator Body (sold separately).
  • New modular design for enhanced accuracy.
  • Compatible with cartridges up to 338 Lapua Magnum and beyond.
  • Precision machined from 17-4 Stainless Steel for durability and corrosion resistance.
  • Highest quality headspace and bullet measuring tools available on the market.

This newly designed Modular Headspace Comparator (MHC) is an updated version of the highly successful dedicated Headspace Comparator previously made from 6061 aluminum. With its improved design, the MHC offers unmatched versatility and precision, making it an essential tool for any gunsmith or shooting enthusiast.

Ensure your measurements are spot-on with these top-of-the-line headspace inserts. Elevate your accuracy today!



Top takeaways

  1. The Modular Headspace Comparator Inserts require a separately purchased Modular Headspace Comparator Body.
  2. These new Modular Design Inserts are precision machined from 17-4 Stainless Steel for durability and corrosion resistance, suitable for cartridges up to 338 Lapua Magnum.
  3. SHORT ACTION CUSTOMS, LLC. produces the highest quality headspace and bullet measuring tools, including the 6mm x 40° w/.273" neck Modular Headspace Comparator Insert.

Attributes

  • Cartridge:
    243/6 mm (.243)
  • Delivery weight: 0.034kg
  • Shipping height: 25mm
  • Shipping width: 89mm
  • Shipping length: 102mm

Item details

Made in USA

Customers reviews

Customer ratings (0)

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Variations:

Cartridge: 243/6 mm (.243) Product no.: 100050139
Not available
41.22 GBP 0 £41.22 *
-13 %
22 CALIBER X 28° MODULAR HEADSPACE COMPARATOR INSERT
47.9 GBP 2 £47.90 * £54.90 You save £7.00
In stock
Cartridge: 22 Caliber (.223-.224) Product no.: 100050131
In stock
47.9 GBP 2 £47.90 * £54.90
-13 %
22 CALIBER X 30° MODULAR HEADSPACE COMPARATOR INSERT
47.9 GBP 2 £47.90 * £54.90 You save £7.00
In stock
Cartridge: 22 Caliber (.223-.224) Product no.: 100050130
In stock
47.9 GBP 2 £47.90 * £54.90
-13 %
25 CALIBER X 30° MODULAR HEADSPACE COMPARATOR INSERT
47.9 GBP 2 £47.90 * £54.90 You save £7.00
In stock
Cartridge: 25 Caliber (.251) Product no.: 100050133
In stock
47.9 GBP 2 £47.90 * £54.90
-13 %
30 CALIBER X 20° MODULAR HEADSPACE COMPARATOR INSERT
47.9 GBP 2 £47.90 * £54.90 You save £7.00
In stock
Cartridge: 30 Caliber (.308) Product no.: 100050157
In stock
47.9 GBP 2 £47.90 * £54.90
-13 %
30 CALIBER X 35° MODULAR HEADSPACE COMPARATOR INSERT
47.9 GBP 2 £47.90 * £54.90 You save £7.00
In stock
Cartridge: 30 Caliber (.308) Product no.: 100050155
In stock
47.9 GBP 2 £47.90 * £54.90
-13 %
204 RUGER MODULAR HEADSPACE COMPARATOR INSERT
47.9 GBP 1 £47.90 * £54.90 You save £7.00
In stock
Cartridge: 204 Ruger Product no.: 100050132
In stock
47.9 GBP 1 £47.90 * £54.90
-13 %
30-06 SPRINGFIELD MODULAR HEADSPACE COMPARATOR INSERT
47.9 GBP 2 £47.90 * £54.90 You save £7.00
In stock
Cartridge: 30-06 Springfield Product no.: 100050163
In stock
47.9 GBP 2 £47.90 * £54.90
-13 %
300 BLACKOUT MODULAR HEADSPACE COMPARATOR INSERT
47.9 GBP 3 £47.90 * £54.90 You save £7.00
In stock
Cartridge: 300 AAC Blackout Product no.: 100050159
In stock
47.9 GBP 3 £47.90 * £54.90
-13 %
300 WINCHESTER MAGNUM MODULAR HEADSPACE COMPARATOR INSERT
47.9 GBP 1 £47.90 * £54.90 You save £7.00
In stock
Cartridge: 300 Winchester Magnum Product no.: 100050162
In stock
47.9 GBP 1 £47.90 * £54.90
-13 %
375 CHEYTAC MODULAR HEADSPACE COMPARATOR INSERT
47.9 GBP 2 £47.90 * £54.90 You save £7.00
In stock
Cartridge: 375 Cheytac Product no.: 100050170
In stock
47.9 GBP 2 £47.90 * £54.90
-13 %
6.5MM X 20° MODULAR HEADSPACE COMPARATOR INSERT
47.9 GBP 2 £47.90 * £54.90 You save £7.00
In stock
Cartridge: 264/6.5 mm (.264) Product no.: 100050143
In stock
47.9 GBP 2 £47.90 * £54.90
-13 %
6.5X55 SWED MODULAR HEADSPACE COMPARATOR INSERT
47.9 GBP 2 £47.90 * £54.90 You save £7.00
In stock
Cartridge: 6.5 x 55 mm Swedish Mauser Product no.: 100050147
In stock
47.9 GBP 2 £47.90 * £54.90
-13 %
6MM X 20° MODULAR HEADSPACE COMPARATOR INSERT
47.9 GBP 2 £47.90 * £54.90 You save £7.00
In stock
Cartridge: 243/6 mm (.243) Product no.: 100050137
In stock
47.9 GBP 2 £47.90 * £54.90
-13 %
6MM X 30° MODULAR HEADSPACE COMPARATOR INSERT
47.9 GBP 4 £47.90 * £54.90 You save £7.00
In stock
Cartridge: 243/6 mm (.243) Product no.: 100050136
In stock
47.9 GBP 4 £47.90 * £54.90
-10 %
7MM REMINGTON MAGNUM MODULAR HEADSPACE COMPARATOR INSERT
44.9 GBP 2 £44.90 * £49.90 You save £5.00
In stock
Cartridge: 7 mm Remington Magnum Product no.: 100050151
In stock
44.9 GBP 2 £44.90 * £49.90
-13 %
7MM X 40° MODULAR HEADSPACE COMPARATOR INSERT
47.9 GBP 1 £47.90 * £54.90 You save £7.00
In stock
Cartridge: 7 mm Product no.: 100050153
In stock
47.9 GBP 1 £47.90 * £54.90
6.5MM X 30° MODULAR HEADSPACE COMPARATOR INSERT
54.9 GBP 0 £54.90 *
Backorderable
Cartridge: 264/6.5 mm (.264) Product no.: 100050142
Backorderable
54.9 GBP 0 £54.90 *
Cartridge: 22 Caliber (.223-.224) Product no.: 100050171
Not available
37.6 GBP 0 £37.60 *
Cartridge: 22 Caliber (.223-.224) Product no.: 100050135
Not available
37.58 GBP 0 £37.58 *
Cartridge: 223 Remington Product no.: 100050134
Not available
37.58 GBP 0 £37.58 *

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