I have that scope mounted on a 40x 308 with 0 elevation in the base and am in the middle of the scope's elevation range. I have about 75 moa below zero so you should be fine.
How many moa of elevation does your scope have? You can look at the specs or count the moa by turning the turret yourself (this is actually the best way).
You should have 140 min. of total elevation on that scope. You should be able to get that zero without a problem with a 20 moa base. I believe that is the stock setup scope and base on a McMillan Tac-50.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: khallmark</div><div class="ubbcode-body">I have that scope mounted on a 40x 308 with 0 elevation in the base and am in the middle of the scope's elevation range. I have about 75 moa below zero so you should be fine.
Kevin </div></div> I have the same but with a 20 min. base and it works just fine.