I sent my VX-3 to them and had them put turret dials for windage and elevation. It is set for the bullet I shoot, Winchester XP3's 160 grain. I use this gun for elk, deer, and bear. I can shoot 500 no problem, haven't really tried reaching much further. I am very happy with the Leupold custom shop. Check out my video in the bear forum Titled "My 2009 Bear(with footage)". Pretty accurate!!!