Good ta hear and thanks guys.
Never used rosin core before. (Im only assuming its in there as I was told it was old "plumbers stuff")
Yes on it also likely alotta tin. I know thats OK. Having been told its old stuff I hoped it might be from before alot of tin was in solder.
But as Bret & Fiver said, it was free!
CW
Not sure I understand your comment about hoping it was old and therefore had less tin. All of the old solder I have managed to accumulate has had a considerable percentage of tin in it, ranging from a low of 35% to a high of 70%. I have rolls of solder, and a fair amount of bars of solder. I have auto body bars and plumbing bars. Some of the coolest ones have raised lettering on them that say, "City of Chicago", on them.
I have always considered tin to be a valuable commodity and back when I could get it for 5 bucks a pound I gobbled up a bunch of it. I used the most in my BPCR bullets ranging from 1 in 20 to 1 in 30. My schuetzen bullets were all 1/20.
Rosin is useful as a flux and I always found sawdust from soft wood high in resin/rosin fluxed the best. I think you are very lucky to score that 20 lbs. and as fiver says, treat it as 50/50 and blend from there. If there if 10 lbs. of tin in there that should be worth at least 150 bucks, then 10 lbs of pretty good pure lead for another 20 bucks. I'd be getting my buddy's son a case of beer!
