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(203 mm) model and a ten-inch (254 mm) model see mass production. The eight-inch (203 mm) columbiad could project a 65-pound shell 4400 yd or 4800 yd for solid shot; the weapon weighed 9240 lb. The ten-inch (254 mm) columbiad weighed 15,400 lb and hefted a 128-pound shell to 4800 yd or solid shot to 5600 yd. These cast-iron weapons were typically mounted on seacoast carriages designed to recoil up a slightly inclined

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