I am biased to the 30 06 as I have recently returned from a plains game hunt with it, from my own experience it was an excellent round for my purposes, all shots were under 250 yards and shot placement was good. That being said the recovered projectiles weighed 110 and 115 (only got 2 back) from a 180gn accubond, so if you like your 270 why not load a 130-150gn mono pill, tsx, gmx, etip, and take that