You ain't gonna believe what I saw at the gun shop last night.
Some guy brought in a couple guns to sell. One was a Pedersoli double rifle in .72 caliber (caplock).
By the time I left there was no deal struck with the shop so I don't know how much it will be priced at. It is really nifty looking but it weighs probably about 12 lb. or more.
Nice condition too. I didn't see any rust on it anywhere.
We were sort of kidding around about it and I said I don't even know how heavy a charge you would put in it. The owner laughed and said "I guess you just reach in the can and grab a handful and throw it down the bore." - in his PA dutch accent.

.710" RB = 539 gr (over an ounce) Goex recommended load is 70 gr of Fg (that's one F) for a MV a bit over 1200 FPS