Headspace Gauges

Hornady Lock-N-Load Headspace Gauge Tool

This affordable headspace gauge from Hornady Lock-N-Load Products (formerly Stoney Point) allows the handloader to measure changes to the headspace of cartridges with a dial/digital caliper. Different headspace bushing sizes (depending on cartridge family) insert into the Hornady Lock-N-Load Comparator Body, which attaches to a caliper. The handloader can then measure the changes between fired and sized brass. This enables the handloader to adjust his sizing dies for a proper cartridge fit in his chamber. When a handloader oversizes his cases it can cause excessive headspace problems, one of which will shorten the life of the brass.





.17 Rem 22 PPC 6MM Rem 223 WSSM 6.5x284
204 Ruger 22/250 Rem 257 Roberts 243 Win 284 Win
221 FB 6PPC 25/06 Rem 243 WSSM 7MM Rem Mag
222 Rem 250 Savage 270 Winchester 260 Remington 7mm Ultra Mag
222 Rem Mag 7BR Rem 7x57MM 270 WSM 300 WSM
223 Rem   280 Rem 7MM-08 Rem 300 Wby Mag
220 Swift   30-30 Win 308 Win 325 WSM
    30/06   338 Win Mag
    300 H&H   350 Rem Mag
    7.62x39   375 H&H Mag
    6.5x55 Mauser   264 Win Mag
    7MM WSM   7MM SA UM
    30-40 Krag   7MM STW
        300 RSAUM
        300 Win Mag
        300 Ultra Mag
        8MM Rem Mag
        338 Ultra Mag
        35 Whelan

Sinclair Headspace Bump Gauge Insert

Sinclair Bump Gauge Inserts are used to measure the amount of shoulder bump when setting up full length sizing dies. These Bump Gauges install in either the Hornady (formerly Stoney point) or Sinclair  comparator bodies and are machined to fit particular shoulder angles of cartridges. Rather than measuring to the datum line, these gages indicate off of the shoulder of the case to get a better, more easily assessable measurement of how much you are actually sizing your cases. We usually recommend between .001" to .002" bump for bolt action rifles and between .003" and .005" for AR-15 type rifles. Also a useful tool for keeping your brass and loaded ammunition separated if you have multiple rifles chambered for the same cartridge and checking loaded ammunition.

Product-# Shoulder Angle Cartridge Suitability


17 degree 30-06 Springfield


20 degree

308 Family
749011478 20 degree * 338 Lapua Magnum
749011471 21 degree 220 Swift
749011473 23 degree

223 Family (222 Rem, 17 Rem, etc.)

749011480 23 degree * 6.8 SPC
749011485 25 degree Most Standard Magnums
749011474 26 degree 6MM Remington
749011472 28 degree

 22-250, 223/243 WSSM, Some Ackley Improved

749011484 30 degree

 17 Fireball, 22/6mm PPC and BR, 204 Ruger

749011481 30 degree *

 7mm & 30 BR, Remington Ultra Mags Up To 338 cal

749011475 35 degree

 284 Family, WSM Family

749011482 40 degree

 Ackley Improved Up To 6mm

749011483 40 degree *

 Ackley Improved Cartridges Up To 338 cal

749011479 45 degree

 Wildcat Cartridges w/45° Shoulder

* For larger shoulder diameters

Wilson Cartridge Case Gauges

The most important use of a cartridge case gauge is for setting up 7⁄8"-14 press type full length resizing dies. A common error in reloading is to oversize your brass. Headspace of fired cases can quickly and accurately be measured using this tool and a caliper.

Regular Style: This one piece gage will check overall length to indicate a need for trimming and datum to head length to assure correct headspace to prevent over sizing.

Adjustable Style: For belted mags. While the belt provides support for proper headspace, the life of the case will drastically shorten unless resizing is held to a minimum at the shoulder.


Pistol Max Gauges: Used to check all critical dimensions of the pistol case - mouth diameter, base diameter, rim thickness and diameter, case overall length and bullet diameter.

Regular Case Gauges Adjustable Case Gauges Pistol Max Case Gauges
.17 Remington 264 Winchester Magnum 32 H&R Magnum
.204 Ruger 300 H&H Magnum 32 S&W Long
222 Remington 300 Weatherby Magnum 327 Federal Magnum
223 Remington 300 Winchester Magnum 357 Magnum
22-250 Remington 338 Winchester Magnum 38 Special
22 Hornet 7MM Remington Magnum 380 Auto
243 Winchester   38 Super Auto
25-06 Remington   9mm
260 Remington   40 S&W
270 Winchester   10mm Auto
30-06 Springfield   41 Magnum
303 British   44 Magnum
308 Winchester   44 Special
338 Lapua Magnum   45 Auto
300 Winchester Short Mag   45 Colt

L.E. Wilson Case Gauge Micrometer

Every reloader should know exactly how much your Full Length Sizing Die is pushing back the shoulder. With the NEW Case Gauge Depth Micrometer you can do just that! 
It has never been easier to measure you cases headspace before and after sizing. The Depth Mic allows you to slip the micrometer perfectly over the top of the gauge with your case inserted into the gauge and take a measurement. 
Graduations in .001" and comes with a Gage Block. One size works for all L.E. Wilson Gages.

Redding Instant Indicator

This precision made tool allows a hand loader to quickly compare headspace and bullet seating depth within .001". The “Instant Indicator” lets you accurately check the headspace from the case shoulder to the base in a couple of seconds. This information is critical for setting up your full length sizing die to allow the precise amount of shoulder bump. The use of a dial indicator with this tool makes each measurement easy to read and also accurate. Using the Redding sizing bushing supplied, you can read seating depth for your cartridges.

The Instant Indicator enables you to compare bullets to each other by checking the bullet base to give dimension. This is a great feature for those wanting to sort bullets prior to meplat trimming. Available with or without Dial Indicator.

Available for the following cartridges
.204 Ruger 260 Remington
222 Remington 6.5/284 Winchester
223 Remington 270 Winchester
22-250 Remington 308 Winchester
22-250 Improved 30-06 Springfield
220 Swift 300 WSM
243 Winchester 300 Winchester Magnum
243 Winchester Improved 300 Rem Short Action Ultra Mag
6MM PPC 300 Rem Ultra Magnum
6MM BR 338 Lapua Magnum

Redding Instant Indicator Range Adapter

The "Range Adapter" makes this instrument more versatile and may now be used at the range or in the field without requiring the use of a reloading press.

Reloading Solutions Limited


Tel: 01865 378200

Opening Hours:

Monday - Friday 09.00 to 17.00 hrs

Saturday and Sunday - CLOSED

Print Print | Sitemap Recommend this page Recommend this page
© 2018 Reloading Solutions Limited. All Rights Reserved. E&OE. Terms & Policies