I shoot a ton of rounds through one of my pistol caliber rifles. I have always used copper coated bullets from some of the larger manufacturers. Recently, I stopped in a shop where the guy has been casting bullets for almost 30 years. I am really tempted to try his casts as they are from a small, local producer and much cheaper. They are wax coated I think. I know there are variables associated with this such as how hot I load but should I be worried about lead fouling if I start to shoot a lot of cast bullets?