Forster 7.62x51mm NATO Minimum Length NATO Chamber Headspace Gauge

Forster Headspace Gage for 7.62 NATO--length is 1.6355 plus .0003 minus zero minimum chamber HG762NATOMin. "Headspace" is the distance between the face of the breech and the base of the cartridge when the action is closed and excessive headspace can be dangerous and impair accuracy. For instance unsupported brass fired in a rifle action with excessive headspace can rupture allowing gas to blow rearward like a rocket exhaust. Because your safety is on the line Forster Headspace Gage are made with meticulous care and exacting manufacturing standards to ensure accurate testing of your rifle's chamber. If a rifle closes on a GO gage the rifle chamber will accept any ammunition that is made within S.A.A.M.I. (industry standard) specifications. If a rifle closes on a NO GO gage the chamber might have excessive headspace. Most gunsmiths chamber a rifle's headspace between the GO and NO GO dimensions. If a rifle closes on a FIELD gage the rifle chamber is dangerously close to or already over the S.A.A.M.I. specified maximum chamber size. Package Contents: Forster Headspace Gage Forster HG762NATOMin: Headspace Gage for 7.62 NATO--length is 1.6355 plus .0003 minus zero minimum chamber