I have just collected 70 pounds of roofing lead and want to start casting balls for my .36 BP Pistol. First though I want to cast it into pure lead ingots (have a Lee Pro 4-20 smelting pot and ingot mould) as when I get more confident I want to add tin etc to cast harder bullets to home-load for my 44 under-lever.

My question is: after I have melted the lead, skimmed the dross off, added flux etc and pored into the mould, do I have to flux again when I re-melt the ingots at a later stage to make my balls?

Thanks John