Bill B
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Magnum primers in a standard cartridge?
Bill B replied to standman's topic in Rifles, Reloading and Gunsmithing
I have found just the opposite. My first experiment was with my .284. 55 grains of H4831sc with BR-2 primers. 1/2" - 3/4" MOA; SDs in the high teens and ES around 50. Switched to Fed Mag Match primers. Reduced the powder by 2 grains. Groups shrank to 1/3" - 1/2"; SDs 6-7 and ES in the teens. Tried it with several other rifles (.260, .308, 7mm-08) and powders I4064, H4350, RL15, RL22) and the results have been the same. Haven't tried them in my .223 yet; but I'm optimistic.