This is a nifty scope! I had one on my AR15A3, zeroed it at 100 yards. Eventually went to a 200 yard range, and used the 200 yard circle, it hit in the 4" circle. I went to the Nikon Webpage where you can calculate your type of ammo with the choices they have for scope models, and found it was all fairly accurate information.
The optical clarity was very good, the adjustment clicks were very well 'felt' and audible. Plus one click at 100 yards did equal 1/4", as it should have.
Had to sell it with the AR as a part of the deal. But my next rifle, CZ 527 Varmint .223, it wears a Buckmasters 3-9x BDC. I truly recommend the Buckmasters to anyone. But do NOT recommend the Prostaff!