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Headspace Gages

Consequences of Improper Headspace

Headspace Gages for Rimmed and Belted Calibers

Headspace Gages for Rimless Calibers

8X57 Mauser (8mm Mauser) Chamber Headspace Variation and Measurement

Headspace Gage to Caliber Interchangeability Tables

Headspace Gage Ordering Chart

Headspace Gage User Instructions

Headspace Gage Sets

Forster Products
310 East Lanark Avenue
Lanark, Illinois 61046
(815) 493-6360
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Headspace Gage Sets

Complete “Match” Headspace Gage Sets for 223, 308 and 30-06 Calibers

Forster’s headspace gages are now available in complete sets for three popular rimless calibers. Each set includes eleven gages, each one clearly marked in .001 in. increments. You’ll enjoy significant price savings over purchasing the gages separately. For shooters, reloaders, gunsmiths or armorers with a serious accuracy and safety mindset, our “Match” headspace sets are a smart choice. They’re all manufactured from top quality hardened steel and precision ground to SAAMI ANSI tolerances.

Headspace Gage Set

Caliber Shortest Length (in.) SAAMI Minimum Longest Length (in.) SAAMI Maximum Order No.
223 (5.56mm NATO) 1.4636 1.4736 HG223MST
308 (243 Win, 7mm-08 Win, 358 Win) 1.6300 1.6400 HG308MST
30-06 (25-06, 270 Win, 35 Whelen, 6.5-06, 8mm-06) 2.0487 2.0587 HG3006MST

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