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Old 02-10-2020, 11:29 AM
jjfitch jjfitch is online now
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Join Date: Apr 2007
Location: Pacific Northwest
Posts: 6,300
LSWC: I have never had to crimp below .469. Doing so may cause other issues!

I have a barrel that is .0005 oversize. Crimping below recommendation causes tumbling/keyholing!

Full disclosure: This is a 9mm barrel that SAAMI specs at .355, barrel specs at .3555!

All the best,
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John, Retired LEO, CA POST Certified Firearms Instructor, NRA Endmt., NRA Instructor, NRA RSO, Blue Lives Matter
Gun Control: Acquire target, align sights, press trigger, only after you have identified your target and what is beyond it and made the decision to shoot!

Last edited by jjfitch; 02-10-2020 at 03:02 PM.
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