If the OP has been shooting a .270 for fifty some odd years I'm not sure there is much difference in recoil for similar rifles, similar bullet weights, loaded to the same velocity chambered for 7x57, 7-08, .280, .270, or for that matter, .284. Yes, some will do it with a bit more or less powder (which will have a minor effect on recoil), some have the ability to go a bit faster (with a bit more recoil), and some might handle heavy bullets better (again with a bit more recoil.) As far as finding ammo in some out of the way place, my money is on the .270. I guess the 7-08 is not far behind, but I admit I haven't looked.
Unless I am trying to build an uber light rifle, I tend toward the longer action and case so as not to crowd either case or action. Lever, semi-auto, or maybe pump I can see the advantages of the shorter rounds, especially for an AR as previously mentioned by another member.
