I had some lead given to me of unknow origin. I can mark/scratch with my thumbnail but using the "pencil test" it shows it being in the 8 to 9 BHN range on the hardness scale. I know pure lead is best, but this stuff was free, and the guy thinks he has more. Considering the patch/roundball combo, would this be okay for banging steel and punching paper ? I have pure lead for hunting roundballs, just hoping to get some use out of this lead. -Thanks