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308 primer problem?

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Unread 02-14-2012, 07:52 AM
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Join Date: Jan 2012
Location: Bean Patch
Posts: 193
308 primer problem?

I bought a Lee auto prime XR the other day. I have always used the press to install primers. Started priming some twice shot Winchester brass that had been tumbled sized and trimmed. I had some CCI # 34 primers and had some real difficulty with seating them. Anyone ever have this problem with these primers ? The primer pockets were cleaned with the the RCBS tool.
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Unread 02-14-2012, 06:16 PM
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Join Date: Apr 2010
Location: Allen, TX
Posts: 2,608
Re: 308 primer problem?

Use a good primer pocket uniformer if you're not already.
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Unread 02-15-2012, 01:48 PM
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Join Date: Feb 2009
Location: Sedalia, MO
Posts: 1,256
Re: 308 primer problem?


CCI primers tend to run a bit "fatter" than others, and this is quite common with them. I assume you're loading for a military rifle with a floating firing pin? Still, you might try another make (Rem 9 1/2, WLRs, whatever) just to see if that resolves the problem. If you're really worried about slam fires, just remember that the thicker cup of the #34 is offset by primers being seated high, which results in an even greater risk of slam fires. Make sure they're seated at least a few thou below the case head, and you reduce the risk of this happening quite a bit, regardless of the make of primer you're using.
Kevin Thomas
Lapua USA
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