Raimey,
Again, thank you. I too noticed the "Crown G" on the shot barrel and wondered. The barrel is definitely a smooth bore and appears to have some constriction at the bore. I suppose that it could have been bored out at some point?

I am working on making up some shotshells and will use it that way. I don't really expect to use the shot barrel very much but I do like to have my guns function.
The .22 barrel is surprisingly accurate.
I would like to figure out what the "shot " barrel was originally chambered if at all possible. Just for my own satisfaction , as I love the history of these fine olds arms.
Mike