Molon
thanks, I'll read about those. ETA DAMN, no idea you could get a scope that cheap.
And the pin gauges seem like just the thing to have.
The tight FN-
chamber side, the gauge fits no problem.
I tried several noveske FN HF, some noveske stainless Bartelin stainless, and another FN, each one fed the gauge.
measuring the Gauge with my cheap Frankford Arsenal Digital Caliper I most often got .2165 as the measurement (.2160 to .2175). I didn't average, just hit it a bunch.