So, I made up some alloy for 45ACP and have begun casting it into finished bullets. I'm enjoying myself and now that I've settled on a patricular mix of my scrap materials, I'd like to stay on this and cast several thousand to have on hand. I mixed 2%ish antimony lead with linotype and 40/60 wiping solder to come up with a theoretical 12.5 bhp hardness according to the lead calculator. 3.2% tin, 3.2% antimony and 93.6% lead. I water drop primarily for convenience. Can I make a bunch of these up and use them over the next couple of years or as time goes by will they soften enough to become a problem?