270 would be adequate for deer. It's a good all around rifle, at least from coyotes to deer. Very good balistics, light recoil. If ther is anythign I can help you with let me know, we need more outdoors men and women. Make sure that you take a hunters safety course and learn to be safe. The single most important thing is safety. Did I mention safety? There is a ton to learn. BTW which branch? And thanks for serving.