Forster Headspace Gage 300 Blackout GO Length Rimless - HG0300G

A precision headspace gauge designed to measure the distance between the breech face and cartridge base when the action is closed, essential for safe rifle chamber testing. Proper headspace measurement prevents dangerous conditions like brass rupture and accuracy loss caused by excessive headspace. This gauge is calibrated specifically for 300 Blackout cartridges in GO length configuration.