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Rifles, Reloading, Optics, Equipment
Gunsmithing
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<blockquote data-quote="25WSM" data-source="post: 2807685" data-attributes="member: 38048"><p>That was always the problem with belted mags. Best you can do is shoot them one time to fireform and then set your dies to just bump from then on. Sometimes that initial stretch is pretty big. Only way to make that initial stretch not start a separation is to load light and seat jammed. Then the front of the case moves and the back doesn't stretch. Be nice if factory mag brass wasn't.020 too short to start with. But thats the way it is.</p></blockquote><p></p>
[QUOTE="25WSM, post: 2807685, member: 38048"] That was always the problem with belted mags. Best you can do is shoot them one time to fireform and then set your dies to just bump from then on. Sometimes that initial stretch is pretty big. Only way to make that initial stretch not start a separation is to load light and seat jammed. Then the front of the case moves and the back doesn’t stretch. Be nice if factory mag brass wasn’t.020 too short to start with. But thats the way it is. [/QUOTE]
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