im getting ready to buy my base to mount a bench rest night force scope.8x32x56.would it be better to buy the uni mount med one?or the med high uni mount?its going on a remington 700 milspec 308.bases are20 moa.and how would you sight it in for a 100 or 200 yrds with a 20 moa on it? seems like it would shoot kinda high even with the elavation down most of the way.or would it be better to buy the regular picatinny base and the rings?