Didn't read all the posts but if you want to stop crimp creep send a 500 dummy round to Lee and for $29.00 they will send you back a Collet Factory Crimp Die.
I use the 350 grain Berry's Plated bullet along with the Speer, Sierra and Hornady 350s and even with H110 loads get no bullet creep...
As to fracturing the plating on plated bullets, I use a lot of .41 and 500 bullets from Berry's and crimp them very heavily and have zero problems at all. Also if you are only using a three die set and seating and crimping in the same stage, get a separate crimp die...
Bob
Last edited by SuperMan; 05-22-2018 at 05:46 AM.
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