Rem-7, I'll give a vote to the .270 Winchester and 130 grain bullet! It's been getting the job done since 1922 or there a abouts.
Now on the other hand, if you wish to hunt elk with a 25/06 have at it, just make sure of your shots, use a premium bullet and don't try those 500 yard friggin shots down range. I would limit myself to 250 yards using a 25/06 with 120 grain bullet. Elk are not mule deer, hell they can soak up a lot of lead. I'll stick with my tried and proven in all circmumstance, .338 Win mag and 225 grain premium bullet.