A sabot of wood, metal, or similar material was sometimes used to help the round during firing from the cannon. Ī cloth cartridge bag containing the round's gunpowder used to fire the canister from the gun barrel could be attached to the back of the metal canister for smaller caliber cannon. The ends of the canister were closed with wooden or metal disks. Iron was substituted for tin for larger-caliber guns. The canister itself was usually made of tin, often dipped in a lacquer of beeswax diluted with turpentine to prevent corrosion of the metal. Canister shot consists of a closed metal cylinder typically loosely filled with round lead or iron balls packed with sawdust to add more solidity and cohesion to the mass and to prevent the balls from crowding each other when the round was fired.
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