Most of the time I use a 308 Win. bolt-action rifle with a 3-10 x 50mm, usually set on 4. I seldom go past 6X. Shots, even on food plots, where i hunt are very seldom past 125 -150 yards.
Sometimes I am hunting in heavy timber where shots are not going to be clear past 50 - 75 yards or so. I take a 444 Marlin Guide that has a 1.75-6 x 30, usually set on 2.5.