I have seen this thread on 2 other forums. But I will have to say it again. The .308 has the edge for 1 reason. There are a lot more match grade bullet company's out here for them. The .270 is mainly a hunting round. As the .308 is more versital. Go from the field to the range and drive tacs. My .270 will shoot under 1in at 100. But with hand loads I can get 5/8' but most .308 can do this from the factory.
chase your dreams... not the competition