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Message: <blockquote data-quote="mr ed" data-source="post: 1697191" data-attributes="member: 6777"><p>another popular reason is that some guys are trying to get top accuracy out of their old milsurp guns by shooting cast lead bullets. they need to know what size to size the bullet for maximum contact with the lands and grooves of the barrel so they don't get any gas blowby and loss of velocity.</p></blockquote><p></p>