9x17

9x17 refers to a specific cartridge size, primarily used in firearms. The numbers represent the bore diameter in millimeters followed by the case length in millimeters. In this case, 9x17 indicates a cartridge with a 9mm projectile diameter and a 17mm long cartridge case. This designation is commonly associated with the 9mm Browning Short, also known as .380 ACP (Automatic Colt Pistol).

The 9mm Browning Short is a rimless, straight-walled pistol cartridge developed by John Browning in 1908. It gained popularity as a compact self-defense round, particularly for smaller, easily concealable firearms. Its relatively low recoil and manageable size make it suitable for a wide range of shooters. While not as powerful as larger calibers like 9x19mm Parabellum, the 9x17 is considered adequate for close-range engagements.

Firearms chambered in 9x17 are typically subcompact or compact pistols, favored for their discreet carry capabilities. These weapons are often chosen by law enforcement, military personnel for backup weapons, and civilians for personal protection. Ammunition for the 9x17 is widely available from various manufacturers, offering different bullet types for various applications, including full metal jacket (FMJ) for practice and hollow-point rounds for self-defense. The cartridge's widespread use has led to its significant presence in the global firearms market.