I agree with HL..You might be able to find someone in your area that really wants the pure lead for Black Powder...might be able to trade nice clean w/w ingots all ready to go instead of spending extraa money on tin, antimony and/or Lino-type.
However....starting with pure lead, you can control your alloy and custom make what ever hardnes you desire. The oposite is not true with W/W. You cannot return it to soft. You can get it a little softer...heat it up and skim it without fluxing, and do not water quench, but they will still be pretty hard.