For many years the high majority of loads I have fired from my M14s and M15s have used 2.9 grains of Bullseye and DEWCs. If much greater powder charges are used grouping performance will suffer. Most of the old-time competitive Bullseye shooters preferred using between 2.8 and 3.1 grains of Bullseye. That was back when many used revolvers in the .22 and "any centerfire" stages. Virtually no one uses anything other than accurized semiautos today.
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