I am trying to justify purchasing the needed equipment to cast my own round balls. My neighbor has 200 lbs. of wheel weights. I read that wheel weights have zink and something else in them besides lead. According to what I have read, muzzle loader projectiles need to be cast from 99% lead. However, does not fluxing the melting lead remove all the impurities? If I have to order pure lead igots, I can get 1 lb for $3 which should make 37-.498 balls. So, it will cost me around $8 bucks to cast 100 balls versus $12.50 (not counting shipping) from Track of The Wolf. In the long run, I know I will save money, but if I can use the wheel weights, I will save a whole lot.