What is the smallest artillery shell? - Quora

Answer (1 of 3): There seems to be a convention to consider anything smaller than 20 mm as small arms, and anything larger than that “artillery” (per Brittanica, anyway), because 20 mm is pretty much the smallest practical size for a “shell”—that is, a hollow projectile containing some sort of ge

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What are the advantages of a tank's gun having a long barrel and a tank having a short barrel? - Quora

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Why is it that when mortars fire there is no spent casing? - Quora

What types of artillery shells can be fired by a modern self

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What was the best general purpose artillery piece during WW2? - Quora

Shrapnel shell - Wikipedia