I am in the process of cutting up some lead sheeting from an old Air Force radar shop I was able to scrounge years ago, it is pretty close to pure lead. I am going to drain my 20:1 I use for the Sharps 45 2.1" and my handguns, I give this soft lead a try with some 58 cal RB, a few 50 cal Lyman 370gr minis, and hopefully some .490 RB when the used mold I purchased arrives. I have been casting for several decades, first 50 caliber round balls in about 10 years or so.