Bar Shot and Chain Shot.
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Chain shot and bar shot were most often used in naval applications. Chain shot, pictured at the top, consisted of two balls of shot that were joined together by a chain. Bar shot, pictured at the bottom, consisted of two spherical balls of shot joined together with a bar. The principle of these types of shot was that they could be fired at the masts and rigging of ships and their whirling action would inflict severe damage.