can't you just drop your #2 alloy in water to harden it, I have done so in both 357 mag 45-70, and 30-06 have no leading problems and I run those 357 mags 162 grainers with gas checks using H-110 they are hot but seriously accurate, and have good luck, why would I want to add antimony? is it better? I drove one of my 405 cast hp's from a lee mould that cruched straght trough a 300lb. bores shoulders, and droped him in his tracks at 70 pases, I'd like to know if adding antimony would improve my results?. kjg