Go with the .308.... It is a great round, with heavier bullets available in factory loadings.

It is also a short action caliber, and is available in more compact firearms than the .270. It is available in standard size guns, but if you want a Remington Model 7 ora Ruger M77 Compact or something like those, you have to get the .308 as they are not made in .270, and I love the shorter guns. They carry and point easier, and they are a lot more user friendly in a tree stand.

I own both of the guns mentioned above, and they see more use than any of my standard length guns, or the long action cal's.

Good luck