I would go with the Accubond or Partition. I have had to many Barnes bullets turn on elk bone to shoot them with much confidence. You won't have any problem if you can hit what you aim at, just don't aim at the heavy leg and shoulder bones, don't croud the shoulder and if it needs another one let'em hold another one. Don't try to shoulder hit them unless your in a spot where you can hit them again, I've seen the shoulder shot fail to many times to make it worth taking, even with larger cals. Some are good at the shoulder shot, I am not and know it so I don't take it!
You see all the pictures of an elk with a big red 20 inch kill zone, don't by into that, they have a kill zone the size of a paper plate from the tip of the leg bone to just under the shoulder blade you can put a paper plate there and if you put it there it's dead 100% of the time and you'll be a pro. Hit higher you spine, hit lower you get the bottom of the heart, hit back you catch the back of the lungs and if you hit forward you catch the front of the lungs and arteries and hopefully stay of the dang leg bone, if you hit the leg bone shoot it again cause it ain't dead.
The number one elk killing tip I have ever got is, shoot them up hill of the truck