It is somewhat of a "grey area" and confusing to some as to "new laws overriding old laws", to me, because of the bore size & Jigojules it is capable of producing, as it stands now, in Canadian law, that cannon is a "prohibited weapon" by description, illegal to sell or transfer.
Personally, just looking at that cannon, i wouldnt consider it safe to fire with a very big powder charge. Maybe a 100 grain BP charge but certainly no more. I have a lot of experience and have studied the use of these &Large bore cannons such as this are a much different cat than just firing BP in a tube similar in size to a muzzle loader rifle. Big tubes require DOM tubing with no weld seam at all and should be at least 1/2" thick wall to be safe, these big tubes with 5 or 600 grains of powder can generate upwards of 27000 lbs (muzzle loader rifles are usually loaded to 15-18000 lbs so significantly less) internal force with a tamped wad of any kind. I do know of an instance south of the border where a couple fellows built a cannon out of just a welded pipe tube and just tamped 2 hotdog buns ahead of the powder charge and it blew apart killing one of them.
They are fun & very entertaining to folks but nothing to be treated lightly because they are a "replica" of some ancient model .
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