The story of the 9mm vs .45 ACP is kind of ... wars would change the course of firearms history. These two cartridges were put up against one another in World War II, with the .45 going on to become ...

With a few exceptions, the .357 Magnum is a revolver cartridge and most often the 9mm Luger is fired from a pistol. Their similarity is that they use bullets of nearly an identical diameter.