I wonder if you could do a barrel/bushing/mag change on a .45 SR1911?
You probably can, but I'm not sure I would. The 45 ACP brass sized cutout in the slide breech face would let a 10mm wander around a bit. My first 10mm was a Glock 21 conversion barrel, which after trying several different extractors I got to work reliably, but not consistently. No FTE/FTFs, but it would put ejected brass anywhere it damn well pleased. I believe this was caused by the slide cutout being for the slightly larger 45ACP brass, allowing the 10mm brass to not be in exactly the same spot every time it ejected. Considering how difficult it is to find 10mm brass, that wasn't acceptable. I replaced it with a Glock 20 - and a 29
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both of which eject brass in a nice pile.
Can someone sell me on 10mm? Wouldn't mind adding another pistol cartridge to the safe after dumping .40.
Don't even consider 10mm unless you reload. If you do, once you get brass it's not at all difficult to reload - a little more powder, .40 bullets are easy to find. Much simpler than reloading 41 Mag.
That said, I wouldn't recommend it unless you really wanted a magnumesque semi-auto pistol caliber to play with. You don't really gain a whole lot with it. Of course if you dumped the 40 S&W because you discovered it was deliberately handicapped, and you like shooting odd cartridges anyway, by all means, get a 10mm. I really like mine - waiting for a 6" barrel for the G20, the G29 is my go-to wandering in the woods pistol, and I'm (slowly!) putting together a 10mm Commander. Now I just need a Sig 220 in 10mm, S&W 1006 and 610, EAA 10mm witness......and now a 10mm Ruger.