Sounds like great fun! I thought a proof load was three times the charge with no projectile? (just what I have been told)
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The gunsmith I use builds cannons for a hobby, and sells them also, they are ultra cool, I’m pretty sure he machines the barrels, they’re about 2inch bore and sorta rust blues them so they look cast, has little wooden trolleys with cast wheels on them. Hopefully when we both get time spare I can be there when he lets 1 rip. If I had the money I’d own 1 in a flash.
That's the kind of thing I'm thinking of when I say canon.
Any more info?link maybe?
But in reality I am keen to build something in V-Can caliber.
https://antique-arms.co.nz/cannon.html
The majority of these are made from 40mm Bofors barrels.
Pretty certain I know the maker of the first cannon in that set of pics he used to bring it out to clevedon pretty regularly. He also made some other interesting bits and pieces.
well at least you know the barrel is proofed well above what you are going to load.
So where do we get 40mm barrel @40mm ??
v-cans 52.8mm :-(
Mythbusters put a bowling ball through a house by accident and they were only using compressed air, no black powder needed.:thumbsup: