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Old April 8, 2012, 08:17 PM   #10
Jim243
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Join Date: January 5, 2009
Location: Just off Route 66
Posts: 5,067
Oh, what you want are CCI No.41/5.56MM primers not mag primers. They are made with a little heavier metal. Those are the mil spec primers.

http://www.cci-ammunition.com/produc...imer_chart.htm

I have slammed the bolt on thousands of Winchester small rifle primers from my AR without one slamfire, but there is always a first time so not a bad idea.

Jim
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