I’d grab the rifle you’re most comfortable with shooting.

Having killed elk with two of your three choices (30-06 M70 Fwt & Kimber 7-08), I’d absolutely be packing the Kimber 7-08. For the elk hunting I do, lighter is righter.

Conditioning and footwear are more important than rifles or bullets...

“Perfection is Achieved Not When There Is Nothing More to Add, But When There Is Nothing Left to Take Away” Antoine de Saint-Exupery