Quote:
Originally posted by The_Dunedan
...'sporting' rifles such a Express rifles, which can fire much larger projectiles, such as the antique 4-bore elephant rifles, or the new Emperor-series .700 Calibre elephant rifles now being produced by Holland & Holland and Purdey's.
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I think that's the point that I'd start calling it a "cannon".
So if you DID have an actual black-powder cannon, what caliber would the cannon balls be considered?