Trying to get a .459 mold in the 240 to 300g range. Mostly for fun type shooting. Only mold I can come up with is a 400 or 405 g bullet. I can size the .459 down to the .458 to use in a sabot. 400g is a big chunk of lead and wonder how much harder the kick will be from a 400g compared to a 250 or 300g. Shoulder has been repaired once and don't want to blow it out again with to heavy a load. Haven't shot muzzle loader for 45 years and looking forward to get back into it again.