I've decided I want to cast some .45-70 bullets for silhouette and paper shooting only. I have some lead from Roto Metals that shows on the label; 1 to 40 (97.5% lead, 2.5% tin)
How would this ratio work out for silhouette shooting? I currently shooting a .535 grain cast, Lyman Postell 457132 purchased from Buffalo Arms. It shows as being 20-1.