Nikon slug hunter 3x9x40 on Mossberg 695?

I'm shooting 2 inches low with remington accutips at 50 yards bullets are touching dead center scope is maxed out to go up. I've tried different rings etc. I counted roughly 200 clicks in adjustments. Seems odd and weird that I don't have enough room to get on. Rings are exact same in height. You think I wouldn't have to shim it I've never had this problem with other scopes. Please Help Thank you. Scope shot that way brand new out of box

Could be any number of things. Maybe you need a higher ring in back. Or, go to a gun store and get a shim and put it under the scope on the rear ring, or cut one yourself from a beer can. Also could be a bad scope. Take it back and ask for a refund.

Center the scope windage and elevation by the number of clicks, remove the top half of the rings, lay the gun on sand bags, lay the scope into the rings, rotate the scope while looking through it, the crosshairs should stay on target. You can do this on your kitchen table looking out of a window.

You also could call Nikon.