As much as I love the .270, I' d probably lean more along the lines of the 30.06 or the 7mm Rem Mag. Here' s why. You' re in Minnesota. Deer can reach pretty good size up there and a perfect broadside shot is not always feasible. Also, you can run into some long shots up there, though rare. So, if it was me, I' d choose the .06 w/ 180 grain bullets for hunting the thick stuff, and 150' s for open country. If, they both shoot well in the gun.

My .02