I must have the exact same double. The barrels are so thick that I could drive nails with them. But I think they are just .060 with just under .050 choke. Talk about a long range gun. It patterned 85 % at 40 yards with my favorite old lead shot load. I wish we could buy a lead shot exemption certificate for these old guns. How nice it would be to shoot lead shot over decoys with a classic gun. Shells costing ten dollars a box instead of $30 and killing birds like a hammer. Oh well those days are behind us forever.
