By the numbers it looks like Rotometals Antimonial Lead (3%-5% antimony) is pretty close to wheel weights with the exception of any arsenic. Has anyone used it and what was your opinion? The reason I'm asking is because I often don't have a lot of time for casting and time gets even tighter when I have to melt wheel weights into ingots and separate zinc ww's etc., so I'd love to be able to buy something close to ww's that I can just throw in the pot and start casting boolits. Lately I've been using 16:1 but it's a bit pricey and age softens a little. I used to buy clip on ww ingots from fleabay but I'm not too keen on doing that since some of the stiff is questionable. Any opinions appreciated.