Scored these two big chunks of lead a few months ago for 50 cents a pound. I believe the guy said they were used as some kinda wheel chocks, maybe for shipping. VERY labor intense to split them in half with a maul. Each weighed 60 pounds. A little chunk that flew off when chopping them tested as Aged Wheel Weight hardness. However, after I cast them, an ingot tested more like 1 in 30 hardness. I think it has tin, because they ‘tink’ instead of thud. Anybody familiar with this type of lead?