I’m too lazy to do it by percentages of elements.
Wheelweights for general use, air cooled for handguns, water dropped for rifles.
For HP bullets, 50-50 wheelweights and pure lead, to keep them malleable.
I’ve been using range lead lately after getting a couple of buckets. I know this can vary a lot, but the hardness is just a touch less than wheelweights in this bunch.
I don’t use linotype much, so keep a pretty small supply.