Best way to size Shotshells. Converts 12 to 410 bore
By John A.
on Dec 25, 2023
The Mec collet is the best way to size shotshell heads back to size. It’ll squeeze high brass back down with ease and won’t leave any scratches on your brass. It’s as easy as loosening a nut, unscrewing the collet, and inserting a new gauge. Yes the 410 collet will fit in a 12 gauge sizemaster or super sizer.
Great part!
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