Unless you plan to shoot farther than 1,200 yards you won't need an elevated base for your rifle. The Nightforce scopes have 100 moa (50 up and 50 down) of internal adjutment. At sea level, my 300 WSM
is about 50 moa low at 1,200 yards. Very few people shoot that far and far fwer ought to be (me included). If you are shooting at higher elevations, tings get even better (i.e. you need even less moa adjustment. HTH.