smoothshooter
50 Cal.
I've never tried melting down tire weights for lead as I have been told they aren't good for casting bullets. I will say about half of the weights I get are made from that steel/zinc material and they don't melt down at all. Still beats buying small bags of egg sinkers
Like others who post on this forum, I have used the non-zinc weights and found them to be okay. I prefer pure lead, because it upsets a little easier for the rifling lands and grooves, but the weights still work okay. In smoothbores I don’t think it matters.
If you have a lot of the lead-type weights, and can get at least some pure lead, you can mix in some pure lead and soften things up a fair amount, and get some use out of the weights. Be sure to sort out and toss the zinc ones before you start melting.