627-foot

Updated: May 10, 2025

The shell from the thirteen-inch gun leaves the muzzle at a velocity of 2,100 feet a second, and with an energy of 33,627-foot tons, or the power required to lift one ton one foot. From this velocity the range is to 1,800 feet a second in the one- pounder, although from the three-pounder at 2,050 feet it averages about the same as the thirteen-inch.

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