double-shot

To load (a cannon) with twice the shot, for increased damage at the expense of range.

The Indomitable raked the frigate’s stern with double-shotted guns.

The boarding-nettings were up, the guns double-shotted with grape and canister, and the swivels loaded with canisters of musket-balls.

Made by molding a second layer of plastic around a plastic or metal base.

This keyboard has double-shot keycaps, to prevent the symbols from wearing off.