So I just got back from the dump and picked up something like 50-70lbs of diving weights. Does anyone know what kind of alloys are used for diving weights or how to find out roughly what I have?
They could be anything from pure lead to melted wheelweights. I used to scuba dive and I'm sure there is no specific formula for diving weights. You could get a lead hardness tester like the SAECO or Lee but for 50-70 pounds it's not worth your while. Unless you're looking for pure lead to shoot black powder I would treat them as wheelweights. If you think they might be pure lead and you're using them for pistol or rifle bullets I would alloy them with wheelweights or Lyman #2 or something similar to harden them up.