Board Thread:Off Topic/@comment-26397825-20160329001315/@comment-26397825-20160408013135

LucasVerBeek wrote: So I changed the weight of the cannon but what would a fitting size be for the ammunition? I will quote myself here now.

A 5 or 6ft barrel would be better, and the outside diametre only needs to be 25cm at most for a 10cm shot, which would still do the crap loads of damage you wish to cause. A  sphere   10cm in diametre filled with Powdered Dust (which is the stronger but more volatile form of it) would produce plenty of splash damage if you design the shots so they break open upon impact. If you make it like a hand grenade and perpherate it around the outside, the shot will break apart easier and created the splash you want.