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You find correct load info at the firing range. Start with 50 grains measured by volume. Shoot a group of 3 rounds at 50 yards from a rest swabbing between shots with one wet then one dry patch. DO NOT adjust the sights. DO note the group size. Add 5 grains (to 55 grains by volume) and repeat the shots. Continue until you reach 90 grains by volume. Your 'correct' load will be the smallest group of 3 shots.
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