As I read through the pages posted by Tinker, I am surprised to read the details of the type of rifling and ball used. On page 16, third paragraph from the bottom, by New York" Weeks Sport". They detail that Tolley made both the Fosberry choke gun, I am sure as soon as the patenet ran out, but also still manufactured the smooth bore. It is stated that the ball is oversize and that there is a small recess before the muzzle which helps with shot patterns.
Great info, Thanks again Tinker!

Merry Christmas!!
JZ