doublegunshop.com - home Forums General Discussion DIY Gunsmithing @ doublegunshop.com Resoldering barrels

Hello Paco,
I have found that solder that melts at a higher temperature does not work well with rosin flux. You certainly can use an acid flux and the neutralize it before joining with rosin, I do not do it that way, I use rosin flux for the whole operation. The key with rosin is to not get it too hot, once it burns you have a problem. I would look for 50/50 myself before attempting to join the ribs, my fear being that the solder you have on hand will become wet at a temp above which the rosin will burn. Of course, you could try on a piece of scrap and see if the combo you have will work. I hope that helps.
Steve