You can load a 30-06/150 to 3000-3100 fps. A 270/130 at the same speed isn't enough flatter to matter. In the 1920's when 270 was introduced a typical 30-06 load was a 150 at 2700 fps. The 270 shot flatter back then, but not today unless you're shooting watered down factory loads.
I've drifted away from 30-06 to 308. There is a difference in drop, but the way I see it out to 300 any one of them are manageable with little hold over. Beyond 300 all of them drop enough that I need a range finder and a scope with multiple aiming points. Even at that I'm not likely to take a shot beyond 300. In fact other than at the range I've not shot at game past 250. I've done it enough at the range that I'd shoot at 300, and up to 400 only if everything were perfect. I'm not good enough past that.
