Scenario: You are convoying a group of settlers across hostile territory to the nearest fort. At the worst possible time, those hostiles show up. Utilizing the tactics that the Sioux used so well at Little Big Horn, they make a charge to draw fire from your "single shot rifles". What they don't know is that you've got those new fangled repeaters that Winchester just came out with. You hold your fire until they make their second charge, and open up will everything available. Then you clean up the last of them with your hand gun.