To be honest, your .270 will be plenty for either hogs or elk. If you want a new gun though, I would go with a 300 win mag.

I own both a 270 and a 300 win mag. The 270 was given to me by my dad as a gift. I prefer the 270, because it's less recoil and has put down a lot of game. I'm keeping the 300 win mag in case I ever get to hunt really big bears.