I pour about 3: 16/1 for PP BPCR, 20/1 for BPCR and some revolver loads, and then COWW and pure @ 2/1 for revolvers. Since I have so much tin, I'll make sure my revolver alloy stays pretty rich.
I only ladel cast so it's an easy matter for me to just drop out the huge ingot after it's cold, label it with what it is, and store it for next time. It's also a good excuse to clean the ingot and pot between alloys. There's always some stuff that can be blown off with the air hose. I average about 300-400 lbs of each on hand and will replenish when the wife isn't looking. She wonders if I'll ever use all of that "stuff". My son has zero interest in it....