Pistol - 40 S&W - USA - Semi Auto - Finding the 10mm far too unwieldy in a handgun, the FBI created the 40 by shortening the case, and thus the power.  The reduced recoil quickly gained favor in the shooting community allowing better combat accuracy.  It is no wonder that the 40 is now eclipsing the 9mm the world over in law-enforcement and military circles as it has 9mm capacities and 45-like power.  Glock did well to chamber a handgun in this cartridge.
