I have the first few seasons of "Have Gun Will Travel" on DVD and I'm working my way through, trying to watch only a couple at a time so that I don't get them all watched up too soon.
Last night, in season two, there is an episode called, "Duel at Florence". Paladin needs to borrow a rifle, so he borrows one from an old-timer (those guys are looking progressively less old, but that's a different topic). The gun he borrows and uses in the ensuing gunfight was a Winchester 1876 carbine. Someone with more knowledge could probably identify the caliber since he is seen loading it and ejecting rounds. At one point, when he needs to jump between rooftops, the '76 magically becomes a '92 when he does the jump, then changes back into a '76, but most of the time it remains the same model.
It was pretty cool. He usually just uses his 7 1/2" Colt, but I liked his pick when he needed a rifle.
I tried to find the episode on YouTube so that I could link it here, but I can't find it. As I said, it was season two, and I think it was episode 5, in case someone else does a better job tracking it down.
CC Griff