I got a couple of hundred pounds of lead that had shielded some sort of solar radiation detector. It also made pretty blue ingots. Beautiful soft lead; probably the best I have ever had. Shoot well, but I have shot everything from that thru wheel weights, melted birdshot, marbles, and ball bearings, just to see how different things worked. None of those made much of a difference except shooting higher or lower. Maybe if I (and my toys) were capable of shooting through the same hole repeatedly, I would notice a difference in accuracy (group size). But I can't, and don't.