Is this any good for boolits? I have been buying solder when I find it at garage sales. A couple rolls are 50/50 and a couple are unmarked but have a rosin core. I have one roll that is a very fine string of solder. Any idea what that one is? It is also unmarked. When I have enough can I melt it all together into small ingots then have it tested at the scrapyard.
Thanks, Tom