grand veneur
AH elite
Don't get me wrong, since I got my last cow elk with my 500 Jeffery, but I think those cartridges are a bit overkill for elk. A 270, 30-06, 7mm Rem Mag or 300 Win or Wby Mag are more than enough for elk at 500 yards with good shot placement.
It always depends on what kind of Elk you are hunting. As foreigners, we mainly hunt big trophy deers in the rut, and there are often surprises how tough they are. That's why practice taught me otherwise.