That all depends on where in KY you are hunting. I live in the western part of the state and it's a mix of terrain. On my farm alone I can hunt in dense woods, sit on a small food plot, or take a 6-700 yard shot overlooking a cornfield.
Most places however, are hills, valleys, and woods. Not much call for a big magnum.
Then again, I hunt with a 7mm Rem Mag.