Two things: 1) I once read a technical report stating that the ideal bullet metal was an alloy 80% Pb, 10% Sn, 7% Sb, and 3% Cu. I lost track of the reference. Does anybody know what reference cited this statement?
2) How would you get that much Cu to stay in suspension in the alloy at around 700 F. The 10% Sn should hold about 1% Cu saturation in the mix, but what holds up the other 2%?
Just questions from another amateur alchemist.
Comment: I have been attempting to use a Rotometal approximation to this ideal solution. Using 5.25lbs pure Pb, 1 lb super tough Babbitt for the infused Cu and Sn and 1.6 lbs of super hard nuggets. Ends up 81%Pb, 11% Sn, 7% Sb, and 1% Cu. The BHN is around 18+ water drop. The gain is super fine and you can hammer it flat and stays together. Once PC'd it behaves like an FMJ, tough and hard. So what more would the extra Cu do if you could make it?