From what I heard from grampa, (he was a trick shooter with a wild west show a young 'un.) and a lot of the way old timers. Black powder cap and ball pistols were still used by a lot of people. They still worked. Also many were sold used for little more than a song. Though most times the folks in the hills were gonna spend their money on a gun it was usual for them to buy either a shot gun, or a rifle. If they were buying a pistol it was most likely the cheapest one they could find. Usualy the cheapest were the cap and ball revolvers.
No matter how many times you do it and nothing happens it only takes something going wrong one time to kill you.