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Old January 17, 2010, 10:09 PM   #2
Senior Member
Join Date: November 13, 2006
Posts: 7,089
Some strongly advocate crimping .223 that will be used in a semi-auto.
The issue is a bullet setback in feeding.
If I do not have a cannelure,I do not crimp.If I had a cannelure,What the heck,I might do a light crimp.

This is assuming your brass is of a consistent length.

Then,I am not an authority,just IMO.
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