Traditionally folks like a alloy about 20:1 for sharps shooting.I realize most use this with black powder.However i shoot smokeless. i shot some 20:1 and it shot pretty good.My question is this.I have range lead that measures 8-9 on the
hardness scale and wheel weights that measure 11-12 on the hardness scale.which of these is closest to 20:1 that i could use as a substitute.