Last year, when I went on my first Elk hunt (bucket list) I worried about everything, especially my rifle. I kept asking my guide what he recommended after witnessing literally hundreds of kills. His response never changed.
He said bring what you are familiar with and what you shoot well. I brought my old early 70’ s REM 700 BDL .30-06 that I bought new. Practiced out to 550 yards but would limit my shots to 400 or less. It worked! Duh!
168 Barnes TTSX hand load. I admit that I felt under gunned after reading a lot of internet gack, but my guide knew what he was talking about.