outerlimits Posted October 16, 2019 Share Posted October 16, 2019 have shot 38s/sc since forever. i am curious why 9major guns need inserts, say for early STI mags. if the loads are OAL almost as long as 38s/sc, why the need for inserts? have always wondered... Link to comment Share on other sites More sharing options...
caspian guy Posted October 16, 2019 Share Posted October 16, 2019 (edited) Look at where the ribs are at the front of an original sti style mag and think about where a 9mm round hits those vs where a 38sc hits them, that's part of it. Sv or mbx or new sti with a single longer rib doesn't require it (though I still use spacers in my sv mags to keep everything the same. I think it also helps to get the nose of the bullet closer to where it should be with respect to the feed ramp for better feeding but that's probably secondary. Edited October 16, 2019 by caspian guy Link to comment Share on other sites More sharing options...
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