Ok So the reason we shouldnt talk about it is that its too easy. I figured people thinking about solid propellant guns were thinking of projectile-rammed onto powder, in a tube called a cannon- OR shotguns. Or primer in brass with powder and projectile, like... a cartridge thingy. Muzzle loaders don...

Spud guns aren't intended to be weapons. One could argue that flare guns, model rockets, rope throwers, and powder primed nail guns, even decoy throwers for retriever training that use 22 blanks like nail guns fall into the same category. [removed by moderator] Of course if you make a cannon out of ...