Which gun is better Cooper 30-06 or Sako 85 300 WSM

[lindstd]

I am in the process of buying a all around gun for whitetail, elk, moose etc. I really like the Copper but it does not come in the caliber that I was ideally looking for. Only a 270, 280 or 30-06. The Sako 85 comes in a 7 WSM and a 300 WSM. I am wondering if a 30-06 would be enough to shot very long range if ever needed? Or should I just buy the Sako 85 in a 300 WSM that I know will get to that range. I know the Copper's are a custom gun and are very accurate and the Sako's are now made on a production line from Beretta. I appreciate anyones knowledge of this subject. Thanks a lot.