Encyclopedia · Projectiles and ammunition

Canister shot

Canister was a thin-walled metal cylinder packed with balls and sawdust that burst at the muzzle, spraying its load like a giant shotgun. It was the artilleryman's most lethal close-range load.

Also known as: canister, case.

In the Half Shell Book: This subject is treated in Civil War Artillery Projectiles: The Half Shell Book, pp. 37-51.
ClassClose-range antipersonnel projectile
ConstructionThin metal cylinder of iron or lead balls packed in sawdust, on a wooden sabot
Ball sizeRoughly 0.65 to 2 inches, depending on the bore
ActionBursts at the muzzle; the balls spread like shot

Construction and use

Canister was a thin-walled metal cylinder packed with musket balls or larger lead or iron balls and sawdust, with a round wooden block, or sabot, on the bottom to center the round and seal the bore. When the gun fired, the cylinder tore open and the balls spread in a widening cone, making canister the artilleryman's most lethal close-range load.

Ball diameter ran from about 0.65 inch to as much as 2 inches depending on the bore. Improvised loads packed with nails, hinges, and scrap are known as langrage. At close quarters gunners sometimes doubled the charge, firing two canisters at once.

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