I needed about 250 pounds of lead to put under the front of a Volkswagen-based kit car I was fooling around with, to even out the weight distribution. I bought a pile of scrapped lead armored cable covering and melted it down into a couple of square ingots which I bolted just behind the front suspension. I paid $10 for about 250 pounds of the conduit covering. I have no idea what sort of alloy it might have been, or how suitable it might be for bullets. It would probably be okay for BP balls and bullets, but might be too soft for modern projectiles. I didn't test it for hardness, all it had to be was heavy and it was that, for sure.