Cartridge (firearms)

A variety of rifle cartridges: (1).17 HM2 (2).17 HMR (3).22LR (4).22 Win Mag R/F.22 WMR (5).17/23 SMc (6)5mm/35 SMc (7).22 Hornet (8).223 Remington (9).223 WSSM (10).243 Win (11).243 Win Improved (Ackley) (12).25-06 Remington (13).270 Winchester (14).308 Win (15).30-06 Springfield (16).45-70 Government (17).50-90 Sharps

A cartridge (also called a round, sometimes a shell) is a type of ammunition, consisting of a cylindrical casing (made of metal, usually brass) that has inside of it a bullet, gunpowder and primer. It is made to fit neatly in the chamber of a gun. This kind of cartridge became usual in the 19th century.