Originally posted by HoOmAn
OOC. This is an interesting point, AK. What caliber or shell weight marks the turning point where firepower actually declines?
It depends very much on what you're firing against and in what conditions. If you're building a land based weapon to destroy fixed targets then a really big gun is pretty useful as the downsides don't matter so much (e.g. 800mm Dora). If I'm in a firefight against chaps in body armour at short range, a 5.56mm automatic weapon seems like a good bet. For period battleships, I think that it's a grey area between 16" and 18". Blast on open AA gun positions and antennas being one of the key factors.