Headspace Gauge 308 GO and NOGO set

The GO gauge is used to measure the minimum allowable, safe chamber headspace. If the bolt does not close on a Go gauge, it is considered unsafe. The NO-GO gauge is used to measure the Maximum recommended chamber headspace. If the bolt closes on a NOGO gauge, it is out of the recomended good condition range, and should then be checked with a Field Gauge to determine if it is still safe headspace. When setting new headspace such as for a rechamber job the bolt should not close on the NO-GO gauge. This gauge set ships only in the USA, No export or APO.