Bluemooncricket Posted February 1, 2014 Share Posted February 1, 2014 Does anyone have experience with Federal 9mm once fired brass having loose primer pockets? When loading with mixed brass on my 550 I noticed that Federal brass offers almost no resistance when seating the primers. My concern stems from some breach face erosion I've noticed on my M&P slide. Quote Link to comment Share on other sites More sharing options...
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