Over 300,000 customers - we say thank you!

40,000+ products for hunting and shooting sports

Enhance precision in neck turning with Sinclair International's stainless steel expander mandrels, designed for perfect fit and easy case sizing.
-12 %

SINCLAIR INTERNATIONAL STAINLESS STEEL EXPANDER MANDREL, 338 CALIBER (.337")

749001158
Variations
Filters:
Variations:

Variations:

-12 %
STAINLESS STEEL EXPANDER MANDREL, 338 CALIBER (.337")
14.9 GBP 12 £14.90 * £16.90 You save £2.00
In stock
Caliber: 338 Caliber Diameter (in): 0.337 Product no.: 749001158
In stock
14.9 GBP 12 £14.90 * £16.90
-12 %
STAINLESS STEEL EXPANDER MANDREL, 17 CALIBER (.171")
14.9 GBP 3 £14.90 * £16.90 You save £2.00
In stock
Caliber: 17 Caliber Diameter (in): 0.171 Product no.: 749001145
In stock
14.9 GBP 3 £14.90 * £16.90
-12 %
STAINLESS STEEL EXPANDER MANDREL, 25 CALIBER (.256")
14.9 GBP 4 £14.90 * £16.90 You save £2.00
In stock
Caliber: 25 Caliber Diameter (in): 0.256 Product no.: 749001161
In stock
14.9 GBP 4 £14.90 * £16.90
-12 %
STAINLESS STEEL EXPANDER MANDREL, 20 CALIBER (.203")
14.9 GBP 6 £14.90 * £16.90 You save £2.00
In stock
Caliber: 20 Caliber Diameter (in): 0.203 Product no.: 749001164
In stock
14.9 GBP 6 £14.90 * £16.90
-12 %
STAINLESS STEEL EXPANDER MANDREL, 270 CALIBER (.276")
14.9 GBP 11 £14.90 * £16.90 You save £2.00
In stock
Caliber: 270 Caliber, 6.8mm Diameter (in): 0.276 Product no.: 749001165
In stock
14.9 GBP 11 £14.90 * £16.90
-12 %
STAINLESS STEEL EXPANDER MANDREL, 7MM (.283")
14.9 GBP 22 £14.90 * £16.90 You save £2.00
In stock
Caliber: 284 Caliber, 7mm Diameter (in): 0.283 Product no.: 749001176
In stock
14.9 GBP 22 £14.90 * £16.90
-11 %
STAINLESS STEEL EXPANDER MANDREL, 6.5MM (.263")
16.9 GBP 7 £16.90 * £18.90 You save £2.00
In stock
Caliber: 6.5mm, 264 Caliber Diameter (in): 0.263 Product no.: 749001179
In stock
16.9 GBP 7 £16.90 * £18.90
-12 %
STAINLESS STEEL EXPANDER MANDREL, 6MM (.242")
14.9 GBP 30 £14.90 * £16.90 You save £2.00
In stock
Caliber: 243 Caliber, 6mm Diameter (in): 0.242 Product no.: 749001182
In stock
14.9 GBP 30 £14.90 * £16.90
-12 %
STAINLESS STEEL EXPANDER MANDREL, 30 CALIBER (.307")
14.9 GBP 16 £14.90 * £16.90 You save £2.00
In stock
Caliber: 30 Caliber Diameter (in): 0.307 Product no.: 749001183
In stock
14.9 GBP 16 £14.90 * £16.90
-11 %
STAINLESS STEEL EXPANDER MANDREL, 22 CALIBER (.223")
16.9 GBP 30 £16.90 * £18.90 You save £2.00
In stock
Caliber: 22 Caliber Diameter (in): 0.223 Product no.: 749001187
In stock
16.9 GBP 30 £16.90 * £18.90
-12 %
STAINLESS STEEL EXPANDER MANDREL, 8MM (.322")
14.9 GBP 7 £14.90 * £16.90 You save £2.00
In stock
Caliber: 8mm, 32 Caliber Diameter (in): 0.322 Product no.: 749011523
In stock
14.9 GBP 7 £14.90 * £16.90
14.9 16.9 11 GBP
-12 %
MSRP £16.90
14.9 GBP £14.90 You save £2.00

Prices inclusive of duty & VAT.

Product no.: 749001158

Mfr. No.: E33

Our neck turning tool mandrels are made from high grade stainless steel on Precision turning centers. The shape, finish, and size are the result of years of use and experimentation by many hand loaders. All of our mandrels fit both our NT-3000 and NT-1000 neck turning tools and most of our older model neck turning tools. Our neck turning tool mandrels measure approximately about .002"" less than the bullet diameter for the caliber. Our expander mandrels are made .001"" larger than the turning mandrels. Using an expander mandrel prior to neck turning sizes the case to fit the neck turning mandrels perfectly. This correct fit makes the turning process more precise and much easier. Any of the mandrels can be used to ""neck"" cases up to the next caliber when used with the NT-EXP (Expander Body).
In stock More than 10 pieces in USA warehouse
1
2
3
4
5
6
7
8
9
10+
-12 %
MSRP £16.90
You save £2.00
£14.90

Prices inclusive of duty & VAT.

You save £2.00
1
2
3
4
5
6
7
8
9
10+

Delivery time approx. 7-14 days.

Delivery time approx. 7-14 days.

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.
  • High-grade stainless steel
  • Precise fit for neck turning
  • Compatible with multiple tools
14.9 16.9 11 GBP
Description Specification Customers reviews Accessories

SINCLAIR INTERNATIONAL STAINLESS STEEL EXPANDER MANDREL, 338 CALIBER (.337")

-12 %
MSRP £16.90
14.9 GBP £14.90 You save £2.00

Prices inclusive of duty & VAT.

1
2
3
4
5
6
7
8
9
10+
-12 %
MSRP £16.90
You save £2.00
£14.90

Prices inclusive of duty & VAT.

You save £2.00
1
2
3
4
5
6
7
8
9
10+

Delivery time approx. 7-14 days.

Description:

Enhance Your Reloading Precision with Our Expander Mandrels!

Introducing the STAINLESS STEEL EXPANDER MANDRELS from SINCLAIR INTERNATIONAL. Crafted from high-grade stainless steel, these mandrels are designed for precision and durability, making them an essential tool for any serious hand loader.

Product Features:

  • Manufactured on precision turning centers for superior quality.
  • Designed based on years of use and experimentation by experienced hand loaders.
  • Compatible with both NT-3000 and NT-1000 neck turning tools, as well as most older models.
  • Mandrels measure approximately .002" less than the bullet diameter for the caliber.
  • Expander mandrels are made .001" larger than turning mandrels for optimal fit.
  • Facilitates a perfect fit for the neck turning process, enhancing precision and ease of use.
  • Can be used to "neck" cases up to the next caliber when paired with the NT-EXP (Expander Body).

Upgrade your reloading setup with our STAINLESS STEEL EXPANDER MANDRELS and experience the difference in your neck turning process!



Attributes

  • Caliber:
    338 Caliber
  • Diameter (in):
    0.337
  • Delivery weight: 0.032kg
  • Shipping height: 10mm
  • Shipping width: 13mm
  • Shipping length: 58mm

Item details

Made in USA

Customers reviews

Customer ratings (3)

3.7 / 5
Recommended

Brownells USA Need for lube ! 30/08/2016

Works OK… if one complies w/ the ABSOLUTE need for lubing either the mandrel (?) or inside the case neck. Do consider groups WILL BE larger because 1) CBTO is not consistent and 2) not being consistent, pressures may increase due to change (.0.002±) brought about by neck tension variation(s) w/ NEW brass. In the end, 100 rounds fired to reach "perfection" of CBTO. So why use the Gen-II set up ?

Definitely recommended

Brownells USA Works Great 19/02/2016

Works very well. Very smooth.

Variations:

-12 %
STAINLESS STEEL EXPANDER MANDREL, 338 CALIBER (.337")
14.9 GBP 12 £14.90 * £16.90 You save £2.00
In stock
Caliber: 338 Caliber Diameter (in): 0.337 Product no.: 749001158
In stock
14.9 GBP 12 £14.90 * £16.90
-12 %
STAINLESS STEEL EXPANDER MANDREL, 17 CALIBER (.171")
14.9 GBP 3 £14.90 * £16.90 You save £2.00
In stock
Caliber: 17 Caliber Diameter (in): 0.171 Product no.: 749001145
In stock
14.9 GBP 3 £14.90 * £16.90
-12 %
STAINLESS STEEL EXPANDER MANDREL, 25 CALIBER (.256")
14.9 GBP 4 £14.90 * £16.90 You save £2.00
In stock
Caliber: 25 Caliber Diameter (in): 0.256 Product no.: 749001161
In stock
14.9 GBP 4 £14.90 * £16.90
-12 %
STAINLESS STEEL EXPANDER MANDREL, 20 CALIBER (.203")
14.9 GBP 6 £14.90 * £16.90 You save £2.00
In stock
Caliber: 20 Caliber Diameter (in): 0.203 Product no.: 749001164
In stock
14.9 GBP 6 £14.90 * £16.90
-12 %
STAINLESS STEEL EXPANDER MANDREL, 270 CALIBER (.276")
14.9 GBP 11 £14.90 * £16.90 You save £2.00
In stock
Caliber: 270 Caliber, 6.8mm Diameter (in): 0.276 Product no.: 749001165
In stock
14.9 GBP 11 £14.90 * £16.90
-12 %
STAINLESS STEEL EXPANDER MANDREL, 7MM (.283")
14.9 GBP 22 £14.90 * £16.90 You save £2.00
In stock
Caliber: 284 Caliber, 7mm Diameter (in): 0.283 Product no.: 749001176
In stock
14.9 GBP 22 £14.90 * £16.90
-11 %
STAINLESS STEEL EXPANDER MANDREL, 6.5MM (.263")
16.9 GBP 7 £16.90 * £18.90 You save £2.00
In stock
Caliber: 6.5mm, 264 Caliber Diameter (in): 0.263 Product no.: 749001179
In stock
16.9 GBP 7 £16.90 * £18.90
-12 %
STAINLESS STEEL EXPANDER MANDREL, 6MM (.242")
14.9 GBP 30 £14.90 * £16.90 You save £2.00
In stock
Caliber: 243 Caliber, 6mm Diameter (in): 0.242 Product no.: 749001182
In stock
14.9 GBP 30 £14.90 * £16.90
-12 %
STAINLESS STEEL EXPANDER MANDREL, 30 CALIBER (.307")
14.9 GBP 16 £14.90 * £16.90 You save £2.00
In stock
Caliber: 30 Caliber Diameter (in): 0.307 Product no.: 749001183
In stock
14.9 GBP 16 £14.90 * £16.90
-11 %
STAINLESS STEEL EXPANDER MANDREL, 22 CALIBER (.223")
16.9 GBP 30 £16.90 * £18.90 You save £2.00
In stock
Caliber: 22 Caliber Diameter (in): 0.223 Product no.: 749001187
In stock
16.9 GBP 30 £16.90 * £18.90
-12 %
STAINLESS STEEL EXPANDER MANDREL, 8MM (.322")
14.9 GBP 7 £14.90 * £16.90 You save £2.00
In stock
Caliber: 8mm, 32 Caliber Diameter (in): 0.322 Product no.: 749011523
In stock
14.9 GBP 7 £14.90 * £16.90

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.

Back to top