Gunman, I can't deterimine the maker from the copy of records I rec'd from Univ. of Glasgo. How do you know it was made by Webly?

The H & H Paradox 12 bore requires a minimum bore dia. of .735". I,ll have to do more reaseach.

Yes, the rifling does start a slow twist about 6" from the muzzle.

Thanks, Jerry