I think that it ranges on 12x. Total adjustment is 45 MOA, 12 MOA per revolution. I have not handled this scope personally, but recieved this info from the guys at Sniper Hide, that have bought some. They look like really nice scopes, and the guys there seem to be impressed with them. You're right 1/4 MOA adjustments. Hope this helps some people out.
BTW, I looked in the online store the a couple of days ago for these, are they in stock yet? Might have to pick one of these up, sounds like it would make a great varmint scope. Have a good one.
Edited to add: Might be better off adding a tapered base just to get some more elevation
Edited by Yotecaller1