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Old September 22, 2012, 10:56 PM   #23
Senior Member
Join Date: September 8, 2010
Posts: 495
It's sometimes hard to get good neck tension using plated bullets. If you crimp too much, then the thin copper plating will return shape, while the soft lead core remains deformed.

I haven't used the Hornady die, but the Lee Factory Crimp die seems to do well with plated bullets, at least for me. I usually adjust the crimp little by little until I get none or very, very little setback. It's a pretty inexpensive die, might be worth trying.
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