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.

The answer is a new rimless cartridge. There were four different magnum-power semi-automatic pistols. They were the AutoMag, Wildey, Desert Eagle and Grizzly. Another model, called the Coonan ...