OK, Ok, my OCD/type "A" personality got me digging through my welding texts. The sort of arbitrary cutoff temp that differentiates brazing from soldering is 450 degrees centigrade. "Sliver solder" therefore would be more correctly called "silver brazing". Hence the temp is a tad high in IMO for thin sxs's barrels. Brownell's Hi-Force 44 works just fine and melts at about 450 degrees Farenheit, considerably less than 450 degrees centigrade. Best, Dr. BILL