For metals, this will be the deal for those who pour their own. I'm curious to see the HDA Weights.
Just for comparison, I dug up some weights of common metals, each is in Pounds of 1 cubic foot...and their Melting Points...
Aluminum 168.48 / 1220 degrees
Antimony 419.99 / 1170 degrees
Bismuth 611.00 / 520 degrees
Cadmium 540.00 / 610 degrees
Lead 707.96 / 621 degrees
Stainless Steel (18-8) 494.21 / 2750 degrees
Tin 455.67 / 450 degrees
Tungsten 1204.41 / 6150 degrees
Zinc 445.30 / 787 degrees
Not all are useable for most of us due to the High Melting Point. Zinc and Tin are useable...meltable.