I was facing a decision between the 270 win and 06 and went with the 270 because of a flatter trajectory and better hunting rifle for my needs. I've seen both rounds in action and if I could have gotten the same rifle in a 30 06 (the deal was a trade for two pistols for 1 rifle and the guy only had a scoped ruger 77 in 270 and an M1 open sites) I would have much rather had a 30 06. I've seen it take whitetails at 400 yards. The 06 has been around for almost a century. The short mag cartridges are suppose to be great but from what i've heard may not have staying power. Go for the 06.