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Old December 12, 2019, 07:06 AM   #48
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Join Date: March 2, 2014
Posts: 8,033
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
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.
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I am NOT an expert--I do not have any formal experience or certification in firearms use or testing; use any information I post at your own risk!

Last edited by stagpanther; December 12, 2019 at 07:24 AM.
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