Do you mean brazing? Sometimes the term silver solder and brazing are used the same, but are not the same.

Silver solder uses a temperature of around 1400 deg. F. and bronze or brass soldering (brazing) uses a temperature about half of the above.

Most shotguns with an extension rib were brazed and the top and bottom rib were soft soldered (around 450 deg. F)

I find it hard to believe Stevens would spend the money for silver solder since it is sold by the troy ounce.

David