So a good buddy of mine owns a garage and he sold me a 5 gallon bucket of weights. There is alot in there! I melted down all the lead and made muffin ingots. So now my only concern is what is the alloy? People say theres tin, some say zinc. I dont know. I usually make bulelts out of lead pipes that are pure lead. All I know is that when I take my ingots and drop them. The lead goes CLUNK, and the wheel weight lead goes CLUNK with a little ding. So id say its harder.