Forster Rimmed and Belted Headspace Gage, FIELD length, for 22 Rimfire, model HG22RIMF, is an essential gunsmithing tool for testing 22 rimfire rifle chambers. This FIELD gauge corresponds to the longest safe headspace; if a rifle closes on a FIELD gage, its chamber is dangerously close to, or longer than, SAAMI’s specified maximum chamber size. FIELD gages are slightly shorter than the SAAMI maximum in order to give a small safety margin.
Machined from A2 tool steel, this gauge is held to tolerances within 0.00015" to ensure accurate testing of your rifle’s chamber. The proper use of a Headspace Gage is the most reliable way to test the length of a rifle chamber, and Forster Headspace Gages are made to exacting manufacturing standards to ensure accurate testing of your rifle’s chamber. Perfect for gunsmiths and serious shooters, the HG22RIMF helps identify dangerous headspace conditions before they compromise safety or accuracy.
