After all the advice I received on my mold question I believe I need to address another issue that was pointed out to me. Oatmeal on the top of my lead. Chances are it's zinc, and doing multiple fluxing/smelting...whatever word you choose to call it, with sawdust will clean it up a lot.
I questioned if there was a way to minimize removing alloys I want. Did some reading, and came away with the sense that if I kept my casting temp around 700 Fahrenheit that the zinc would not melt into my alloy and be captured by sawdust fluxing.
Am I correct, or are there better materials and ways to do it.
I'm finding this all quite interesting, and enjoy learning the process.
Or....in the end if I'm getting good fillout with what I have leave it alone, and buy some good certified alloy for hunting applications. Naww, what's the fun in that.
Thank you all for your guidance.