Just a suggestion on lead source.
I have gottne ALL my lead from 2 reliable sources.
1) Gun Club back stop lead trap. Good lead, but lots of copper jackets, paper, cardboard, and plastic from target backers.
2) Purchase at the local recycler. Got some really good stuff there. Lead pipe, Monotype, Linotype, Wheel Weights, Sheet Lead, pure ingot lead, and some who-knows-what lead. Even about 50 pounds of Speer Bullet Swaging rods. All at market recycle prices.
While I did not buy it, there were several times they had rolls of pure lead that weighed over 100 lbs.
Final Note: If anyone plans on using battery lead, please have someone post when the gun auction will be held.