As needed depending on if I want to cast for low, medium, or high velocity. I only have two pots. One 20 pound bottom pour and a 20 pound for ladle pouring or pre heating alloy for marathon bottom pour sessions. Emptying the alloy is no big deal. Pour what is left in the pot into a muffin pan and stamp L, M, or H on the ingots depending on what I’ve been casting. Three favorite alloys are all I mix and cast with. Unless I live to be 120, I have enough of everything to keep mixing and casting the same three alloys till I die so I keep it simple. When I die my son can start a “how can I tell what these ingots are” thread on here.
Willie