Buck and ball

X-ray of a Brown Bess musket recovered by LAMP archaeologists from an American Revolutionary War era shipwreck lost in December 1782. It is believed to be a 1769 Short Land Pattern, and is loaded with buck and ball.
Buckshot pellets from the American Civil War

Buck and ball was a common load for muzzle-loading muskets, and was frequently used in the American Revolutionary War and into the early days of the American Civil War. The load usually consisted of a .50 to .75 caliber round lead musket ball that was combined with three to six buckshot pellets.