I've had better luck getting excellent accuracy out of cast bullets in the 270, and at some scorching speeds (for cast bullets). Longer neck helps in that regard. For jacketed bullets, I can see a thin advantage going to the 308....shorter action, less powder, more suitable powders, component availability, yada yada yada, but I can't see that one could ever tell the difference between the two on animals big or small, as long as the right bullets were used.
