something in the 270/30-06 class is all you need for elk at reasonable ranges. As in under 500 or so....and most of us should not be shooting over that, if that. Shot placement is still 90% of killing elk. Plenty of folks with 6.5 creedmoors are showing that more power is not as important as more accuracy.
Gave my OLD Savage 110 in 30-06 to my son. That old gun is lights out with 180 Partitions. True one ragged hole. Replaced it with a 300 WSM. Sometimes I regret that choice. Been toying with getting another 30-06. I"m getting old enough to start paring down the safe. Well, maybe not.