Do not use any semi auto's as they can jam.
ANYTHING can jam. Even a single-shot ball-and-cap black powder muzzleloader. Ask me how I know :(
Revolvers DO jam. Among other things (other thins = "common jammed mechanism failure modes"), they can go out of time. They can do Really Ugly Things when they go out of time (as ugly as a Glock KB, if not worse).
A good SA pistol, properly maintained, with quality ammunition, will be as reliable as anything else. Anything else NOT properly maintained, WITHOUT quality ammunition, will be as UNRELIABLE as anything else.