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Message: <blockquote data-quote="dennishoddy" data-source="post: 3755400" data-attributes="member: 5412">I have some of those cases. They work great when enlarging the primer pocket to accept a 209 shotgun primer with a .22 pellet pushed into the throat of the round. It will completely penetrate a 2X4. Built several of the same rounds with solid brass cases that required a punch at the neck to stop the pellet from falling into the body of the brass. Brass cartridges expand and stay there. The poly cases went right back to original specs so the pellets could be easily retained. Not my design, I copied it from some of the same items for sale on the internet. Actually made a thread of that project and posted it on here 5 or 6 years ago.</blockquote>