Yes, 20MOA base. I'm not going to touch the zero stop or the turret covers and I'll just optically center it using the mirror method dialing the turrets. Then I'll install it and zero it at 200yds by twisting turrets. Then I'll set the zero stop and windage cap and then just dial the turrets until they stop to see how much room I have. I'm sure it'll be sufficient to reach 1000yds.Are you going to be putting a base on that has MOA's built in? They have the scope centered and then to adjust for elevation means you're doing an awful lot of work just to screw it up. And as far as windage would it not be just as easy to count up your total clicks and go back to the middle