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Old January 13, 2013, 08:55 PM   #14
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Join Date: December 24, 2008
Location: Loveland, CO
Posts: 1,434
Second, don't crimp plated bullets hard. Give them a very light crimp, enough to get the bell out of the case and just a slight grip on it. I say this because the plating is very thin, and crimping them hard (I've done it) will lead to bad accuracy, even keyholing.
And, the 40 headspaces off the mouth of the case, so a hard crimp is going to cause headspace issues.
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