To answer Smoakingun's questions, yes to all.
I have checked and torqued everything.
From what I calculate, Emcon5 is right, I am zero'ed at somewhere between 500 to 600 yards.
I don't think the bases I have, which are leupold, are tapered, but I may have to check again. I have not tried switching them front to back.
Other than the elevation, the gun is right on, my windage is nearly dead center to the scope, and the gun can group 1.5" at 300 all day long. I shoot at ranges from 100 out to 1000, so the 20moa would be fine, just don't need 40.