In .001" Increments For Precise Measurement Of "Match Grade" Chambers

Lets you know the exact headspace dimension on any rifle chambered in .308 Win., .223, or .22LR. Covers every size chamber all the way from Go to Field, in .001" increments. Perfect for match shooters, armorers, or sportsmen looking for the most accurate, and reliable way to track locking lug and chamber wear on high quality, match grade barrels. Each gauge is precision-ground to the exact tolerance listed.

MIXING AND MATCHING BRANDS OF HEADSPCAE GAUGES Don't do it !! That's the short answer, here's why. It boils down to tolerance stacking. Each Headspace Gauge manufacturer works within a range specified by SAAMI. Manufacturer "A" may work at the high end of the range while Manufacturer "B's" gauges are in the middle of the tolerance range. Mixing the two could give an inaccuratereading. By sticking with one brand within a particular caliber, you will eliminate a variable. If you have a Forster, .308 GO gauge, get a Forster, .308 NO GO. Use Clymer with Clymer and Manson Precision with Manson Precision, etc. You can use any brand of headspace gauge with any other brand of chambering reamer. e.g. Forster Headspace Gauges with Clymer Reamers, Manson Precision Gauges with JGS Reamers, etc.

AR-15, Issue:11, Page:087
Big Book Catalog, Issue:73, Page:098
Big Book Catalog, Issue:73, Page:446
Big Book Catalog, Issue:73, Page:468

SPECS: Individual high speed steel gauges, hardened and ground. Kit contains 1 each of size listed.


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Cartridge: 223 Remington

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Cartridge: 243 Winchester, 7 mm - 08 Remington, 308 Winchester