I've been looking at getting a Knight long-range hunter in 52 cal for a while and found that they can use saboted .458 cal bullets, does anyone know of a load that uses 500 gr. .458 bullets like the Barnes TSX? Is such a load even possible? I'm just curious. I want to use a muzzleloader for grizzly bear and figured if such a load is possible, this would be the load to use.