Originally Posted By: postoak
Hot Blue ?



I believe Postoak has it. So they don't have to rust blue them would be my first impression. And some makers still use soft solder, for that matter. Rigby's double rifles are soft soldered, if I remember from the article on them - they have a torch at the regulating range so they can make adjustments to the barrels/ribs during the regulating process. I assume this means soft solder, but I'm not sure of it.