List of handgun cartridges.
Winchester Magnum .45ACP Caliber(11.5mm) AND Remington Magnum .44Caliber(11.1mm) High-Powered Handguns.
Photos: Thompson .45ACP Submachine-Gun
( The 9mm is low-powered & ineffective at close-quarter-combat. The .44 and .45ACP are the most powerful, commonly used HandGun cartridges. )
The old powerful Thompson .45Caliber sub-machine Gun (1930) is still used in the US, because of its heavy fire-power. It is a terrorist killing-machine.
Similarly, the S&W Magnum 629' 6" .44Cal, is the most powerful revolver. No one survives a CQC gun-duel, within 90 meters (100 yards) with it.
Video: .44Cal 'Desert Eagle' Automatic; (Israel) @@@@@@Another good Video of: .44Cal 'Desert Eagle' Automatic; Israel Weapon Industries.