I own a cannon. It’s a 3″ bore mortar that shoots a tin can half-full of cement, weighing roughly 1 lb, at least 300 yards. Why only half-full? Because with a heavy nose and an open back, the can acts like a huge shotgun slug, flying nose first in a stable fashion, instead of tumbling like the cans full of cement.
I used to do Revolutionary War re-enactments. We had a crazy old Marine WWII Vet who owned a cannon (a Six Pounder if I remember correctly). He would shoot it empty at the Memorial and Independence Day parades and during re-enactments. He also would shoot targets with cement cans. Pretty accurate and devastating power.
This was in Massachusetts of all places – which wasn’t always the nutty lib-hole it has become.