CCI primers oversized?


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trbon8r
December 7, 2008, 01:13 PM
I've been using CCI primers for years with great success. It seems lately I'm having more problems with their #300 large pistol primers. I'm loading on a Dillon 550 for .45 ACP. I'm finding that many of the CCI primers are taking more force to seat than usual. For lack of a better word, it feels like many of the primers are being "mashed" into place. Normally I can feel the primers slip in with a little resistance and then bottom out in the case as I push the press handle forward. With many of the primers I've been getting lately, you feel resistance right away as soon as the primer contacts the case, and there is a sensation of mashing the primer into place. This happens with at least 30 to 40% of the primers.

This is happening with a mix of brass, Remington, PMC, Winchester, CBC, and CCI. I've even had a couple primers that flattened out bad enough that I discarded the casing. Oddly enough the biggest problems I have are with the CCI brand brass, which has always seemed to me to have tight primer pockets.

Is anyone else having similar problems? I'm wondering if CCI is making their primers towards the fat side of their tolerances these days?

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Galil5.56
December 7, 2008, 02:34 PM
I think so, and my experience mirrors yours exactly.

bullseye308
December 7, 2008, 09:07 PM
It's possible, I'm having the same problem with CCI 300's going into 45's.:cuss: Using the Lee hand primer they wouldn't seat flush, so I added a piece of aluminum tape to the top of the primer rod and viola, they seat not.

Chief-7700
December 7, 2008, 09:36 PM
What is why I only use Winchester primers. Only time I have had a problem
was with a missed Mil piece of brass got into the mix.
Chief

ReloaderFred
December 7, 2008, 09:46 PM
CCI primers use a harder cup. If you want to know if they're larger in diameter, the easiest way to find out is to measure them with a good quality micrometer.

Hope this helps.

Fred

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