you may well find some of the primers were crimped in place...a quick whirl around the lip of primer pocket once old primer removed will add a champher where the crimp was,dont over do it 1mm at very most...just enough to remove the crimp ding and ensure smooth entry of new primer....IF you are using mild/middle of road loads and not stretching barrel...mixed brass wont bite you on the bum....it cant. none of the loads will be over or under loaded,forsure it might be only 1" group capable not 1/2" but for 99% of my sub 250yard hunting..who cares,the animals sure dont notice.
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