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Message: <blockquote data-quote="Blitzfike" data-source="post: 2734058" data-attributes="member: 807"><p>Take your barrel out and put a loaded 9mm round in it, look at the feed ramp and see if the ramp extends past the solid web portion of the case. If the case is properly supported, meaning that the wall of the case isn't exposed to the feed ramp, then you should be good to go. The poly bore leads easier than a conventional cut rifling does, but keeping your velocity from going hyper helps a lot with the leading. Jim</p></blockquote><p></p>