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This thread is really an effort in fullity. If yuor talking smooth bore then just keeping your ball as round as possible is about all you can do. With rifled barrels you first have to have a twist rate that will stablize the bullet weight, or to be more accurate, the lenth bullet your useing. By the time you get down to the effects of the primer, the powder and the lenth of jump to the lands you have already passed some many factors that are so much more important that you are now down to final tunning.
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Catfish
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