Forster 7.62x39mm SAAMI Dimensioned Go Length Rimless Headspace Gauge

Every gunsmith knows that the proper use of a headspace gage is the most reliable method to test the length of a rifle chamber. "Headspace" refers to the distance between the face of the breech and the base of the cartridge when the action is closed. Excessive headspace can not only be dangerous but can also negatively affect accuracy. For example, unsupported brass fired in a rifle with excessive headspace can rupture, causing gas to blow rearward like rocket exhaust, creating a serious safety hazard. Forster Headspace Gages are meticulously crafted with precise manufacturing standards to ensure accurate testing of your rifle's chamber. If a rifle closes on a GO gage, it means the chamber will safely accept ammunition made to SAAMI (industry standard) specifications, ensuring both safety and reliability.