The BSS has the barrels and ribs silver soldered together, and the barrels are chopper lumps, each half of the lump is joined with brazing material that flows at a higher temperature than the silver solder when the ribs are soldered. The weld puddle gets contaminated by this brazing material, at least with TIG. Laser may not have this problem. This info came to me from someone that used to work for Browning, and also was my experience.

Dennis Potter