You cast for each caliber? I tend to get alot of molds, try the boolits, find one that I like. Then only cast and load for that combination. 45ACP only load 200gr Lee SWC. 44mag 310 gr Lee RFN. I keep these as my 'can use for what I need' loads. When I find the 'one' load that shoots good , I get rid of the rest of the molds. Have done the same for 7x39.