Shotgun cartridges

Generally speaking primer cups for rifles differ in size, structure, and amount of priming composition from those used for pistols and revolvers. Primer cups for use in rifles, pistols, and revolvers range in size from 0.175 to 0.210 inches in diameter. For shotgun cartridges, the primer cup is typically in the range 0.240 to 0.245 inches in diameter. 

In shotgun cartridges the pellets are contained within the cartridge case. The pellets in a cartridge are normally the same size and composition, but cartridges are available that are loaded with a range of different pellet sizes (Duplex). 

These loads contain some sort of pyrotechnic composition and can be used for signaling purposes, to provide a source of light for brief periods, or as fireworks. They are mainly available in 38 Special and 9 mm Parabellum calibers or in 12- and 16-gauge shotgun cartridges.78,79... 

Cartridge cases are generally brass ( 70% copper and 30% zinc) and can be plated with nickel, aluminum, or steel. Steel coated with zinc or copper has been used but rarely. Shotgun cartridges are usually fabricated from cardboard or polyethylene with a brass base. 

Remove crimp from a 12 gauge shotgun cartridge with pen knife. Open cartridge. Pour shot from shell. Remove wads and plastic liner if present. 

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