The .270 is a smaller diameter, faster, improved version of the 30-06. Then came the .280 because it was still faster and sexier than the 30-06 and because guys like me just need something different because the 30-06 and the .270 we have has since our teens was just not as cool. 7MM but in a non-magnum case. Then came along the 338-06 which was sexy and a bigger caliber. I am sure there are more from the same old '06 case but are they really ever that much of an improvement? if I am a hunter, probably not. if I am a rifle and ammo manufacturer, then sure, the new, sexy cartridge is the greatest thing out there.
I am still not sure why I ever bought a .260 Rem but probably because it is cool, lightweight, compact, accurate and because I didn't already have one in the gun safe....
