I am shooting a .260rem and the best load I have worked up is at max according to Hodgdons data. It is Win brass, 44.5gr H4350, Federal large rifle match primers. and 142gr SMKs. I worked up this load in the heat of summer and noticed the primers have slight flattening. Should I work back down to find a lighter load? There are no other signs of pressure. Cases look normal, bolt shows no signs. I hear the Fed primers are the softest? Should I be worried? I have shot about 100 rds of this load so far.
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