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outerlimits

Mag Inserts

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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...

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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 by caspian guy

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