Just got 600 lbs of lead. Its lead wire .280 guage and 4.5% sb and 1% sn. Not sure what the SB is, or SN. Any clue? Its very soft, to soft for bullets I'd think, so I imagine I will need to add something. Tin maybe??? So far all my loading has been with jacketed bullets. So this is a whole new world for me. What all will I need? A mold, a batton, a pot to melt in, what sort of heat source? What else? Any good site you could direct me to to read up more on casting?