Grapeshot

In artillery, a grapeshot is an ammunition that consists of a collection of smaller-caliber round shots packed in tight geometric arrangements into a canvas bag and separated from the gunpowder charge by a metal wadding, rather than being a single solid projectile. When assembled, the shot resembled a cluster of grapes, hence the name. Grapeshots were used both in land and naval artilleries. On firing, the canvas wrapping disintegrates and the contained balls scatter out from the muzzle, giving a ballistic effect similar to a giant shotgun.
Grapeshot was devastatingly effective against massed infantry at short range, and was used against massed infantry at middle range. Solid shot was used at longer range and canister at shorter. When used in naval warfare, grapeshot served a dual purpose. First, it continued its role as an anti-personnel projectile. However, the effect was diminished due to a large portion of the crew being below decks and the addition of hammock netting in iron brackets intended to slow or stop smaller shot. Second, the shot was cast large enough to cut rigging, destroy spars and blocks, and puncture multiple sails.
Canister shot, also known as case shot fired a larger number of smaller projectiles loosely packaged in a tin or brass container, possibly guided by a wooden sabot. The later shrapnel shell contained similarly smaller projectiles, and used a timed bursting charge to expel those projectiles from the front of the container.
Langrage is a type of improvised round that uses chain links, nails, shards of glass, rocks or other similar objects as the projectiles. Although langrage can be cheaply made, its ballistics are inferior to metal spheres.
In Popular Culture.
Grapeshot is referenced in the A. W. Burns/George W. Hewitt song "America Shall Aye Be Free".