If you will not be taking shots beyond 325 yards the 06 would be my choice. It can shoot flat enough and can deliver 2000 LBS of KEbeyond 325 yards. Longer shots tilt the scales toward the 270 WSM. Keep in mind if 06 ammo is half the price of 270 WSM then you can get twice the trigger time and better develop your skills. The 270wsm will be around, I would not worry about that.