It's up to the individual caster to determine the percent composition of the alloy. I have something that's close to a #2 Lyman alloy, but can't say for sure since i don't have a hardness tester. All i know is they're hard enough to go fast and too hard to fingernail scratch. I drop them from the mold into ice water for a little quench hardening. The base ingredients are readily available for a good alloy. I used roto metals for antimony and tin. Lead is from either the tire shop, or scrap yard.
