I usually leave my 20lb pot mostly full when not in use. Doesn't seem to take long to remelt and I figure it helps prevent rust inside the pot. So it has maybe 17lbs or so of basic range scrap alloy in it currently. I've been casting pistol bullets from it. I want to do some 225 bullets to load for 223 now. Thinking of casting pistol bullets to get the pot down to maybe 14-15 lbs of lead. Then adding different alloy to try and harden whats in there some. I have COWW ingots, roughly 1lb each. Also have seveal bags of nuggets from Rotometals, both Hardball and Superhard. These nuggets seem to be around a couple oz each in weight. If I dropped in maybe 2-3 of the superhard nuggets, approx 30% antimony each, would that be about right to work with the amount of lead currently in the pot? I didn't think adding a couple lbs of COWW or a handful of hardball nuggets would add more than a fraction of a percent.
Tried to play around witb that alloy calculator on here. Doesn't work well on my phone for some reason. Can't add any values.