There is a possibility that the ammo you were shooting was not up to the advertised velocities, I know it's a stretch that a company would do that sort of thing, but it could happen. :lol: . Different people are bothered by different things, but I got to tell you that a scope settling in after you adjust it would bother me alot. Some of the less expensive scopes will change the POI when you change the power setting. I didn't see where you said what kind of mounts you're using, anyway the 1st thing I would do is get a better scope, something along the lines of a VXII, Nikon Monarch or the Burris Fullfield II(around 200-250 bones). All these scopes are in the med. type price range and are a real good deal considering the quality of optics, features, tracking and warranties for the price. I'm not running down Tasco, I know they are a good value for the money, but if your looking for consistant, repeatable accuracy, good glass and strong mounts are a must. Your rifle will only be as good as your scope. The scope is the one thing that is between your rifle and your target. IMO the scope and mounts are the last place to cut costs. Just my 2 cents.