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Message: <blockquote data-quote="shortgrass" data-source="post: 775576" data-attributes="member: 8362"><p>Be aware that any crimp increases pressures, it just takes more force to get the bullet moving. I have always used a 'good' roll crimp on .357 revolver loads when I load magnum rounds both to make sure the bullets don't jump and ,I feel, efficiency is improved with slower burning powders.</p></blockquote><p></p>