With 30-06, a one piece rail won't get in the way of loading and ejecting. just takes a little getting use to! And a one piece will let you set the best eye relief. You don't need a 20 Moa rail unless your shooting extreamly far, the vortex has a huge range off adjustment. A 20 Moa won't get you much more clearance, the are made to allow for more adjustment for shooting long range.
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