A 230 grain round ball will kill a moose. They are not that difficult an animal to bring down.However, considering their size, you may not get the ball to penetrate completely throught the ribcage. If you are only capable of tracking blood trails, use the conical to get full penetration and a double blood trail to follow. There are 437.5 grains( approx) to the ounce, so you are shooting a one ounce slug at the moose if you use the conicals. They will get the job done, even if they hit bones. Good luck on your hunt. Let us know and see some pictures if you are fortunate to get your moose.