I have a friend who owns a tire store and he gives me an almost unlimited supply of wheel weights in 5 gallon buckets. These were the basis for making #2 alloy and for pistol bullets for years. The last couple of buckets I got from him contained about as many zinc and other non lead weights as they did the lead alloy kind. These apparently contaminate the mixture when we melt them down. They are a real nuisance not only because I have real difficulty with my back, and moving all this weight of useless zinc is a problem, but I have no way to conveniently separate them. I have a thermometer and I try not to get the pot hot enough to melt zinc in case I let some get through my sorting, but I've read that any zinc probably will permanently contaminate the mold.
How many of you still use wheelweights, and how do you handle the zinc problem