OK, don't laugh. I own a cannon.
It is a black powder cannon, 2" bore. I used to take it to Independence Day picnics and set it off a couple of times. It makes a huge noise and lots of smoke. At night, the muzzle flash is awesome. I never shoot projectiles except for tight wads to allow proper breech pressure and big boom. And I mean big. Louder than any fireworks.
I have not shot it in a few years because of no opportunity, but it is perfectly shootable. It is safe as long as one remembers the absolute three rules of cannon shooting: Do not stand in front of it. Do not stand behind it. Swab the bore.
To shoot the cannon I need 6-7 Oz of 1F powder and some 3 or 4F for the vent hole if I am going to touch it off. I usually use cannon fuse of about 3 seconds/inch and avoid the 3 or 4F.
My first question: If I go and buy that stuff to shoot my cannon, will I get put on a list? I buy from a huge blank powder supply house in the area.
My second question: What is the best soap to get blank powder residue off my skin before the next time I fly?
A third question that is completely informational: Can I bring cannon fuse on the plane? What about checked? (It is probably considered an incendiary.)
Yes, these are serious questions.