There are plenty of .277 options for the 270 WSM and the hunting you are describing if you prefer a little less recoil vs 7rm and 28 nosler. Using the stock 1:10 twist barrel the 140gr Accubonds are a great option out to 700 yards. At an easily reachable 3100 fps the Accubond will deliver over 1200 ft-lb of energy out to 700 yards. This is a very comfortable round to fire and can deliver great accuracy. If you can utilize the pills being manufactured around 170grs the 270 wsm becomes even more attractive for long range hunting. That being said, you can't go wrong with the 7rm either. Another great option. If you get a chance, shoot and compare the three you mentioned. I end up taking the 270 wsm on deer and elk hunts as often as other calibers simply because it is comfortable to shoot without a brake and has never let me down.