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Message: <blockquote data-quote="Rod Snell" data-source="post: 1672744" data-attributes="member: 796">There are 2 custom Open guns shooting 9mm major at our range, and their brass is visibly "jugged," different enough to usually sort out by eye.  I'm pretty sure their chambers are on the "loose" side, which exacerabtes the problem. If in doubt, I try the empty backwards in a case gauge to check for swolen head.If you want to use the over-expanded brass, you can take the guts out of a Lee FCD and push the empty all the way through it. I used a push rod from a Lee bullet sizer.</blockquote>