Ksmirk: I have this scope as well. Mine has 60 MOA as previous poster stated. As for running out of adjustment trying to zero it in, I did this as well. I attached a 20 MOA base on a 300 WSM
with the Nikon. Couldn't get it zeroed to save my life. Posted on here and mulled over it for a few hours. I had realized what everyone had posted when I read the forums. 20 MOA base was installed backwards. I looked closely and sure enough. Turned it around and zeroed it with no problems.