(firearms) The container that holds the bullet, primer, and gunpowder in a cartridge.
(Left) Three non-bottlenecked cartridges (9×19mm Parabellum, .40 S&W and .45 ACP) (Center) Three bottlenecked cartridges (FN 5.7×28mm, 5.56×45mm NATO and .300 Winchester Magnum) (Right) Two polymer-cased 12-gauge shotshells