Some cartridges incorporate a single solid projectile referred to as a slug (often fired via a rifled slug barrel). The casing normally includes a paper or plastic tube which has a metallic base made up of the primer. Shotgun cartridges are generally calculated by "gauge", that's the load, in https://300blk15803.getblogs.net/68001994/federal-premium-personal-defense-ammunition-45-acp-210-grain-hydra-shok-deep-jacketed-hollow-point-an-overview