My PT-92 and my PT-911 have never jammed. The PT-911, I've had since last year. The PT-92, I've had since 1992. I bought a 617B late last year, and so far, none of them have given me any trouble. I've feed all sorts of ammo through both automatics, and they've fed them all without a hitch.
The trigger on the 617B was a bit stiff in DA mode, but that worked out in the first 100 rounds. The DA triggers on both autos are kind of heavy, but the SA trigger on both is more than acceptable for me. The SA trigger on the 617B, if I look at it wrong, it goes off.
I feel comfortable carrying any of them. Gotta get the ribber grips for the 617B though, before I shoot anymore magnum ammo. That thing hurts otherwise.
FYI, when I carry my Taurus autos, I carry them cocked and locked.