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Old February 20, 2012, 03:30 PM   #3
m&p45acp10+1
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Join Date: May 3, 2009
Location: Central Texas
Posts: 3,310
I have never used a crimp on rifle round that go into a bolt action rifle. Nor have I ever crimped a .223 round that was ging into an AR. I have never had the need to. They hold just fine with neck tension.

I have 3 sets of rifle dies that allow for a crimp if the reloader wants to. I tested crimped rounds, against uncrimped rounds. The uncrimped gave more consitint groups. That has been my experienc. YMMV
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