I had some low radiation lead for a while, makes for an interesting curio. As I recall its providence was re-melted musket balls from a shipwreck in the Bahamas.
Yeah :-) I kept it as a neat hack for selling lead from a shipwreck that had paid for itself by selling off the gold and other bits, and the salvage operator was effectively eeking out a few more bucks from the geek crowd :-).