Quote:
There's a 10-thou tolerance on the case length (1.700 - 1.710), and the same on chamber headspace (1.710- 1.720)
Interestingly, the 45 ACP case has 10-thou on the case, 20-thou in the chamber; similar for the 9mm
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Exactly--point being that that much potential headspace in a
higher-pressure locking bolt semi-auto set-up is beyond what I've ever encountered, and why I was told to watch it closely. Keep in mind I'm not "pulling the alarm" until my components get here and I've had a chance to measure everything.