I have a Hornady headspace gauge and I find it measures my .308 cases .009" shorter than actual headspace, as measured from the datum line on the sholder to the head of the case.
So if my Hornady headspace guage measures a specific .308 case at 1.624" that case is actually 1.633".
Anybody else notice this?
I know the Hornady guage is intended to be use as a reference, but how hard would it be to machine these guages to the correct specs.