Just a different thought------I would use the 270 & take the money & buy a GOOD pair of binoculars. Like a pair of Swarovski, Leica or Ziess.

Your 270 will take any elk. The binoculars will last forever & are a HUGE advantage in glassing elk country. Not to mention all your future hunts. Cost about the same when you add in the cost of the rifle, scope & mounts.

But IMO the classic elk cartridge is the 300 Win Mag. But with that said I've used the 30/06 for over 20 years & never had a problem. I'm also sure I could have subed the 270 & been completely satisfied.