You can also "Bet your Last Dollar" that a bbl having Braised/Silver Soldered ribs was simply pre set & was not regulated for point of aim. On higher grade guns this often required several "Melts" & re-attachment of the joining. This was not done when the higher melt mat'l were used for joining. This is just another reason why a Stevens was Hard Soldered & a Purdey Soft Soldered.

Miller/TN
I Didn't Say Everything I Said, Yogi Berra