I have little to offer over what these gents have told you, but to say I have been an elk hunter and a guide for many many years.
The 270 is a very good round. Use a tough bullet. 150 or 160 are best and most rifles will shoot them well. If you have one that won't and you need to go to a 130 just go to a Barnes X or a Nosler partition and you'll be just fine