Then there was "the good, the Bad, and the Ugly," with Clint Eastwood putting cartridges in muzzle loading revolvers.
Many black powder revolvers (NOT muzzle loaders) were converted to cartridge firing, very common, still available today on the replica market and in demand by Cowboy Action shooters.
Don't get me wrong, I have always very much enjoyed the G,B, & U movie, however as someone pointed out, Clint Eastwood's cartridge conversion Colt did not exist in that time period. Also, notice that Lee VanCleef has a percussion Remington which is period correct, but he carries it in a holster rig with loops holding metalic cartridges. Eli Wallock's Colt Navy is period correct, but he gets metalic cartridges from the storekeeper to load it with. And, to really get nit-picky, what's the deal with Eastwood firing the cannon with a fuse instead of a friction primer? If not a friction primer, a quill & linstock would have been accurate. Granted, neither method would have had quite the dramatic effect as lighting a fuse with a cigar.
