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Message: <blockquote data-quote="swampratt" data-source="post: 3231460" data-attributes="member: 15054">If you have some CCI 450 primers I would try them also.In my .223 the 450 primers and H4895 was the best.And one big factor was when temps changed from 20 degrees to 90+ outside the loads with the 450 primers grouped the same.I also loaded 8208 into the .223 to test  primer cup strength and the 450 cup was much stronger.Not that you are going to load until the primer fails.I do not even use the 400's any more.</blockquote>