That was why I started this thread! I can water quench a mediocre alloy and it will be "hard". I can take that same alloy and shatter it like glass against the right medium at the right velocity. A rifle bullet made of Linotype will be a varmint grenade. I have never fired a pistol bullet made of Linotype, so I dont know. I imagine it would work about the same.
Point is, unless I missed it, no one can define "hardcast" in performance, hardness or recipe. I know Max can tell us how it performs as far as purchased commercial ammunition or bullets, but does anyone know how to make it and have it hold up?? I could sell someone water quenched wheel weight bullets and call them "hardcast" and yes, when you hit a whitetail in the lungs and it goes all the way through someone might say "Oh yeah, them hardcast bullets went right through the animal.". Well ya dont say?!
In Veral Smith’s book from LBT fame he lists out the exact alloy that will make a lead bullet at 25 hardness and still be mailable enough to not shatter on heavy bones. I know a couple specialty ammo producers that use this alloy (I have a small stash of it squirreled away) in their custom loads. I know to have the mills produce the mix is bloody expensive, about double what 2/6 alloy runs. I don’t recall the mix and my book went missing a few years ago, but I should probably order another copy.