Clip on have a lot of antimony in them as well. Something you don't want. Lead just went up at my local scrap recycle yard. It went from 48 cents a pound tot 53 cents a lb. for pure. I have paid as much as 1.45 a lb back when I was getting started and rotometals was at 5.50+ a pound. Not hare to figure at all. Have you called any scrap yards. Many he tones of it. One batch I bought was from a PD range. All 40 cal speer gold dot. The plated shells floated to the top of the smelting pot, and they bought it back from me as scrap. Stick on's can be pure lead, some mix, or zinc. So the advice to use caution is valid. Knife