I voted yes for the Semi-Auto. I had a barrel bushing break in a Colt combat commander that sent the bushing and recoil spring down range, another 1911 the firing pin retention plate slid out, and another that broke the slide stop. I've never had a catastrophic failure like that with anything but 1911s. That is why I won't carry one for defensive purposes.
I should have voted both though. I had a S&W 686 lock up once. I don't know why it did it but I was later able to get it open and it worked fine after that. I think it may have been a loose primer.
Why has INTEGRITY become such a rare commodity?