Encyclopedia · Artillery concepts

Smoothbore and rifled artillery

Civil War guns were either smoothbore, firing spherical projectiles from an unrifled bore, or rifled, firing elongated projectiles spun by grooves. Rifled guns gained range and accuracy; smoothbores kept advantages in canister and rate of fire.

Also known as: smoothbore vs rifled.

SmoothboreUnrifled bore firing spherical shot, shell, case, and canister
RifledGrooved bore firing elongated projectiles spun for stability
Rifled advantageGreater range and accuracy
Smoothbore advantageEffective canister and simple, fast loading

Two families of guns

The artillery of the war divided into two great families. Smoothbores such as the Napoleon fired spherical shot, shell, spherical case, and canister from an unrifled bore, and remained deadly at close range and quick to serve. Rifled guns such as the 3-inch Ordnance Rifle and the Parrott fired elongated projectiles that spun for stability, reaching far greater ranges with much greater accuracy.

The war was a period of transition between the two. Rifling proved decisive against fortifications and at long range, while smoothbores held their place in the field for their canister and their reliability, so batteries often mixed the types.

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