Dear John: Many thanks for your reply. I have just bought a good Digital camera, and will try and get good photos posted ASAP. I shoot a LOT of BP, and Swiss is my powder of choice. So far so good. A friend of mine (barrel maker John Getz) has a RB mold throwing a .768 RB. Do you think that would be a good projectile to start with? Regards. TD Addendum 10/3/06 A trip to my barrel-maker friend John has brought the following to light. The gun is, indeed, not a 10-bore at all. Measurements of the bore (the best we could do with available spuds and a mike)indicate tha this gun is a "tweener". That is, our measurements show it to be an 11-bore. Our calculations indicate a round-ball (twist measurement shows somewhere in the neighborhoodof 1-66" to 1-72")of about .728 to be close enough for starters. This will make the 9-3/4# gun a little more fun at the bench. ("Admission". I DO own a lead sled and intend to use it in this case study.) Regards Again. TD Addendum 10/17/06 Put the Jeff Tanner .728 mold to work today. Average weight of the balls is right at 570 grains. I think I have me here a BP .500 Nitro! What Fun!! Regards. TD