My most reliable/dependable?
All of them. I don't have any problems with any of my pistols, shotguns, or rifles.
Well...OK, one rifle. I have a bolt action, of all rifles, that has an occasional problem extracting and I don't know why. Eventually, I'll get around to replacing the extractor on the bolt (which I can't see any problems with on inspection or comparison with others) to eliminate that as a possibility. But even so, I could swear the cases I end up tapping our are a wee bit snug. One day I'll remove the extractor and do a series of firings where I tap all the cases out and see if any are snugger than others.