If you want one that is likely to function without extra work, your best bets (after .45ACP) are .38 Super and 10mm. You could probably do well in one of the other 9x23-sized cartridges, but if you know about those, you know what gun you want already.
9mm is bit behind those in terms of potential reliability. You might get luck, maybe not. They are without a doubt the least expensive centerfire 1911 to feed and probably the most fun to shoot too.
I would not wish a .40S&W 1911 on my enemies (unless they were trying to shoot me). For everyone who claims they possess a 100% reliable single stack 1911 in .40, there are probably five who have nothing but headaches. That's not counting the people who claim their .40 works, but either don't shoot it enough to know or are not being as . . . forthright as we might prefer.
9mm is bit behind those in terms of potential reliability. You might get luck, maybe not. They are without a doubt the least expensive centerfire 1911 to feed and probably the most fun to shoot too.
I would not wish a .40S&W 1911 on my enemies (unless they were trying to shoot me). For everyone who claims they possess a 100% reliable single stack 1911 in .40, there are probably five who have nothing but headaches. That's not counting the people who claim their .40 works, but either don't shoot it enough to know or are not being as . . . forthright as we might prefer.