The Firing Line Forums - View Single Post - Loose fitting CCI primers

Major Dave (retired) · February 14, 2012, 04:00 PM

I usually load WLR primers into Win brass, and they are a very snug fit.

But, my new "project" involves loading CCI #200 Large Rifle primers into Rem brass. They offer almost no resistance when seated, using the same hand held Lee Auto-Prime tool I always use with my Win primer/Win brass projects.

The Rem brass I am using is from once fired .270 WSM Core-Lokt factory ammo.

Are CCI primers a thousandth or so smaller than Win primers?

Or...does Rem brass have larger primer pockets than Win brass?

Or ... is .270 WSM such a high intensity/pressure round that it loosens primer pockets?

Worry, or not to worry?

P.S. I am going to load Trail Boss powder so the pressures will be only about 25 to 30 thousand PSI - not enough to push loose primers out of the seats, I suppose. Or not?

February 14, 2012, 04:00 PM	#1
Major Dave (retired) Senior Member Join Date: March 12, 2008 Location: Between Dallas and Shreveport, LA Posts: 569	Loose fitting CCI primers - normal? I usually load WLR primers into Win brass, and they are a very snug fit. But, my new "project" involves loading CCI #200 Large Rifle primers into Rem brass. They offer almost no resistance when seated, using the same hand held Lee Auto-Prime tool I always use with my Win primer/Win brass projects. The Rem brass I am using is from once fired .270 WSM Core-Lokt factory ammo. Are CCI primers a thousandth or so smaller than Win primers? Or...does Rem brass have larger primer pockets than Win brass? Or ... is .270 WSM such a high intensity/pressure round that it loosens primer pockets? Worry, or not to worry? P.S. I am going to load Trail Boss powder so the pressures will be only about 25 to 30 thousand PSI - not enough to push loose primers out of the seats, I suppose. Or not? __________________ Artillery lends dignity to what would otherwise be but a vulgar brawl.