Re: Federal Gold Medal 215 match primers vs Federal 215 primers
I would agree with a prior post about looking at the ES using the 215 primers. If they look good, I wouldn't bother changing anything. I have found tighter ES using 215M primers in my 260. With my 6.5x284's I have seen differences between the Federal standard, match, and magnum primers. The match give best ES in my Savage with 4831sc, and the magnum give best ES in my Cooper with Retumbo. If there is a difference, it is usually in ES rather than group size between the standard and match primers. I went through all this four years ago when primers were scarce and standard primers were all I could get(hope I doesn't happen again). I had made the decision before that time to use the match for all my work given the small price difference.
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