OK, I will ask. Does anyone know a good source here in Indiana for Ammonium Nitrate for exploding targets? Tannerite is fine but at $6 a pop, it is a little expensive. That being said, I am comfortable that I have a working formula for targets and a source for all other materials. What I am talking about is one 50 lb bag every now and then. I don't mind signing and stating its intended purpose is for exploding targets either. If the supplier cannot sell for my intended use, I will not buy from them. I don't mind a visit from the ATF to check that I am only making targets for my personal use. I don't break the law and have the correct stamps on my toys.