270 shoots a touch flatter, 30-06 has a better selection of preloaded bulletweights, and if you hand load can out do the 270 due to an even greater bullet selection... .284 is 7mm so 270 is sub 7mm in diameter and .30 or.308 either or is 7.62 mm roughly speaking, to give you an idea for easy comparisons. So if I recall correctly 270 is somewhere around 6.5 mm... but I need to double check that...
.270 is 6.8 mm
Wow… you have resurrected the only argument that has been going on longer than 9mm vs 45, revolver vs semi-auto, iron sights vs scopes and probably even Ford vs Chevy. It started in the 30’s and keep shooters & hunters entertained for decades. It was never really settled; it just kinda died out when magnums were discovered.
270 is my personnel choice from experience. I was out hunting caribou and shot two of them at just over 400 yards and the 270 did great with a NP bullet. I will not ever get ride of that gun. For moose I use a 338 mag only because while hunting moose there are also brown and black bears and I would rather hit those with a sledge hammer if need be. IMHO
There are three rifle calibers you can find at just about any country store...they are 30-30 winchester, 30-06 and 22lr....For this reason alone I would go For 30-06...But I also prefer 30-06 to a 270. simply because of the wide range of bullet weights you can find for 30-06..Also the 30-06 can adequately kill any game in North America including the big bears with the right weight ammunition, the .270 just isnt as versatile...
In most of my big game hunting (whitetail mainly), I prefer the .270 round. It is a flatter shooting round, and I like the knockdown power of that fast paced bullet. I love both of my 30.06 rifles, do not get me wrong. I just think they are your grandpa's rifle of yesterday. There are alot of great calibers available that have great knockdown power, and a variaty of loads that can perform well with each rifle. I would do a little research on the different calibers as they pertain to the main game you will be hunting.
The 270 is a popular cartridge out here in the west where 300+ yard shots are common, but I would agree that the venerable 30-06 is the more desirable cartridge for the survivalist due to its versatility and availability. Either one would be a good choice though.