I've had several autoloaders jam on me including but not limited to two 1911s, two or three Glocks, and of course my .22 Buckmark. Strangely I tend to take excellent care of my weapons and practice a pretty firm and controlled grip. The only two autoloaders I have put very many rounds through that have not jammed have been my mom's CZ75 and my Beretta 92, both in 9mm. It pains me though because I love the feel of the 1911 and the .45 round, but I am slowly becoming convinced that 9mm may be an inherently more reliable round. I guess it could make sense if you think about it though, .45 ACP usually uses more powder and burns at a lower pressure for a less complete burn which amounts to more gunk building up in the action per round. At least with FMJ, the 9mm usually is a pit more pointy than the rounded .45 ball rounds.
Anyway, based on the above mentioned, my next gun will be a 4" GP100. My 6" GP100 has been flawless, but it is a little big. I did have a new revolver fail on me once. I'm not sure exactly what happened, but the innards actually broke and it had to go back to the factory. The mechanism got locked up.