Hunter Bob is going to want a heavy well constructed bullet. Look at Federal Cartridge 150 gr. Nosler Partions. There's also Federal's 140 gr. Trophy Bonded Bear Claws and 140 gr. Nosler Accubond.

Get ready. You'll be getting a decent amount of encouragement to choose or recommend a bigger caliber. There's also going to be a number of posts stating the adequacy of the 270 and a subset of those will add that it limits your options in the field. Interestingly, go to Federal Cartridge and use their ammo selector. Select elk and they don't give you anything smaller than the 7mm mags to choose from.