I've pondered this same cartridge loonism. Keep your 270 Win, find some Re 26 and have fun. I've shot more than a few critters with 270 Win, 280 Rem, various 7 mags and I see no real advantage over the plain jane 270 loaded with good bullets. I comfortably got 3000 with my last 270 and 150 Partitions. I even managed to kill a couple elk at a combined distance of less than 65 yards, one measured in feet. Miraculously, it worked. Deer really don't like that combination. Never shot a pig wih a 270 but can't imagine it would be any different.
The other thing I'd say with respect to recoil. You can buy a lightweight 270 (Kimber MT), mount a good scope on it and keep it under 7 lbs. A 6.5-7 lb 270 shooting 150 gr bullets at 3000 isn't a wimp in the recoil department - about like an 8lb 7 mag/270 WSM. The difference is the 270 will be in the 25 ft/lb range and the 7/270 mag in simialr weight rifles will break 30-31 ft/lbs. Again to me, I've always noticed when recoil exceeds 30 ft/lbs. If I hadn't bought a 280 AI after my 270 was "donated", I'd already own another 270 win - and bypass all the WSM, WM, and the like. I'm still tempted to buy another - just because.
