RE: Back up rifle necessary?
After much review I purchased my second rifle which might replace or back up my 270. When you go on a paid hunt, I would recommend bringing 2 guns if it is feasible. Some outfitters help in the need.
I love my 270 but broke down and bought a Winchester Model 70 Classic Super Grade III in 300 WSM. Ballistically it out performs the old standby 30-06 which would have been my 3 rd choice behind the 270 WSM.