=I am getting a TC Renegade with a Green Mountain 50 caliber fast twist barrel for an elk hunt this fall. I have a maxi ball 50 caliber mold. I believe it will cast about a 370 grain bullet but I haven't weighed any yet. My question is what lead hardness should I use for elk. Pure lead or lead with a little tin, such as 20-1 or 30-1 ? For a harder bullet for more penetration on elk.