just playing around with one of my 1911s and i thought i would try it with a 40 S&W round for fit--
to my suprize the 40 round fit the 45 acp mag fairly snug, so i thought i'll see if it will chamber the round and it did--
i thought well , lets see if it would eject-- and it did--- so i fed and ejected a few rounds by hand cycle --all but one ejected fine ---
so i'm thinking that 40/10mm is close to 45 enough that a barrel and extractor swap might work --key word here is MIGHT work -- the 40 round found its way in that 45acp chamber slick and quick-- however a 40 chamber is quite a bit smaller --sooooo---
anybody try a 40/10mm barrel in a 45acp slide ? did it work? or was it a jam-o-matic? just fiddiling around with it it looks like it could work --provided your slide-frame runout is within certain limits --then again there might be ramp problems as well--???