I personally would have to choose .270. That caliber has and extremely flat trajectory, sure the 7mm would be flatter but where I hunt the longest shot I have ever had the oportunity to take was between 175 and 200 yards. For whitetail 7mm is a little much, a well placed shot w/ a 22lr will put a deer down (They used to allow you to hunt with a .22 in Wisconsin). For me, being an unexperienced shooter, I shoot guns with less kick better, the large calibers will make me flinch.