Forster Products Headspace Gage GO .22 Rimfire

Headspace Gage Features If a rifle closes on a GO gage the rifle chamber will accept any ammunition that is made within SAAMI (industry standard) specifications. If a rifle closes on a NOGO gage the rifle chamber might have excessive headspace. Most gunsmiths chamber a rifle's headspace between the GO and NOGO dimensions. If a rifle closes on a FIELD gage the rifle chamber is dangerously close to or already over the SAAMI specified maximum chamber size. Headspace Gage Specifications .22 Rimfire S.A.A.M.I Rimmed and Belted