I haven't thought about that gun for a long time Daryl. It was 55 # as I recall, had a barrel 3" across the octagonal flats and was 54" long. I put a curly maple butt stock on it, held to the breech by a tapered #5 pin. The butt plate was a big Scheutzen styled thing that weighed 4#. The action was underhammer percussion, and it sported a lolipop rear tang sight. All the steel was browned. I understand that it was purchased from its owner by a gun shop in Washington, to hang above their front door like a sign.
We didn't shoot it offhand, obviously. We shot 300 grains of powder, which number we just pulled out of the air, and the 1" ball patched in denim. The recoil was not unpleasant at all...just a long steady uncontrollable push - actually pushed me off the stump at the bench. We never targeted the cannon, but I recall accuracy was quite acceptable at the 300 meter backstop. And great fun to shoot.