Shotgun shell, Military Wiki

A shotgun shell or shotshell is a self-contained cartridge loaded with lead shot or a shotgun slug which is designed to be fired from a shotgun. Most shotgun shells are designed to be fired from a smoothbore barrel, but dedicated shotguns with rifled barrels may take a number of different rounds. A rifled barrel will increase the accuracy of slugs, but makes it unsuitable for firing shot, as it imparts a spin to the shot cup, causing a centrifugal force that makes the shot form a hollow "O" shap

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File:Shotgun Shell 12-70 Gauge 70mm No 9.5 2mm 24g green transparent.png - Wikimedia Commons

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