According to my Thompson Center manual, shooting 90 grains of Goex 2f and a 350 grain maxihunter or 370 maxiball will have a muzzlel velocity of 1465 f.p.s. and a muzzle energy of 1764 ft. lbs. I've never hunted elk with a muzzleloader but I would think that would have a lot of down range thump.. good luck with the elk.