Every gunsmith understands that the correct application of a headspace gauge is the most dependable method for assessing the length of a rifle chamber. Headspace refers to the distance between the breech face and the cartridge base when the action is closed. Excessive headspace can pose safety risks and compromise accuracy. For example, unsupported brass fired in a rifle with excessive headspace may rupture, causing gas to escape rearward in a manner similar to rocket exhaust. Given the critical importance of safety, Forster headspace gauges are crafted with meticulous attention to detail and stringent manufacturing standards to ensure precise testing of your rifle's chamber. If a rifle closes on a GO gauge, the chamber will accommodate any ammunition manufactured within SAAMI (industry standard) specifications.

• Extensive range of rimless gauges in large calibers
• Engineered from premium-grade, hardened steel and meticulously precision-ground to meet stringent ANSI and SAAMI specifications
• The headspace tolerance is precisely ground to an exacting specification of +/-0.00015 inches
• Each headspace gauge is meticulously inspected using NIST-certified measurement instruments