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Edward429451 · May 8, 2012, 12:31 PM

I assume it is to avoid slamfires in ARs, much the same way that Rem 6 1/2 primers are not to be used in ARs, where the 7 1/2s are the correct one.

May 8, 2012, 12:31 PM	#2
Edward429451 Junior member Join Date: November 12, 2000 Location: Colorado Springs, Colorado Posts: 9,494	I assume it is to avoid slamfires in ARs, much the same way that Rem 6 1/2 primers are not to be used in ARs, where the 7 1/2s are the correct one.