10mm Auto Ammo

The 10mm Auto (10×25mm or 10mm Automatic) is a semi-automatic pistol cartridge introduced in 1983.

Although it was selected for service by the Federal Bureau of Investigation (FBI) in 1989, the cartridge was later decommissioned (except by the Hostage Rescue Team and Special Weapons and Tactics Teams) after their Firearms Training Unit eventually concluded that its recoil was excessive in terms of training for average agents and police officers' competency of use and qualification, and that the pistols chambered for the cartridge were too large for some small-handed individuals.

At mid-range potential, the 10mm Auto produces energy higher than an average mainstream .357 Magnum. The 10mm outperforms the .40 S&W by 270–300 ft/s (82–91 m/s) for similar bullet weights when using available full-power loads, due to the 10mm Auto's higher SAAMI pressure rating of 37,500 psi (259 MPa), and the larger case capacity, which allows the use of heavier bullets and more smokeless powder.

The 10mm Auto is marketed for hunting, defensive, and tactical use and is one of the few semi-automatic, rimless cartridges that is legal for hunting white-tailed deer in many U.S. states.

(Source: Wikipedia)