A number of years ago, I soldered a set of barrels with high temp Hi-Force 44 which melts at 650F. That solder had no color or surface indications any different than lead-tin solder.

My point is; there are many many solder alloys out there with all different melting temperatures, most of which are higher than 363F 60/40 tin/lead.

Hi-force 44 flows at 475 degrees.

Brian, Hi-temp Hi-force 44 melts at 650f. Two different solders.

Is my math right? Is that a round every 3.5 seconds for 2.5 hours? That's incredible!

Gotcha. Missed the high temp part. Thanks for clarifying.

Your forend wood will burst into flames (or the multi-trap will seize) before you ever remotely approach the temps required to melt the solder used to hold your barrels together.

Standard 60/40 tin-lead solder melts at 360f.

. . . and wood will burst into flames at 572 degrees fahrenheit.

solder
 

Anyone where to get 60/40 or 50/50 lead solder, all I can find is lead free, it does not flow or hold as well as lead tin.

Ron Moore

eBay does pretty well with it. Search for solder and stained glass. The suppliers for stained glass cameing have some great choices for a few great ratios. You will just need your own flux. The solder is not cored. I have had good luck with Avril 63/37. Avril has 50/50 and 60/40 too.