Sounds like the scope is just dialed for a zero at a range substantially longer then you're shooting at. Just going off of the data that Mel has on the main page, sounds like you're looking at something in the neighborhood of at least a 5-600 yard zero. If you can dial the scope way up, then do it. If you can't dial the scope that much, then maybe you need to see what kind of rail is on it. Barring all of that, you may want to remove everything and try bore-sighting the rifle. I know Mel has discussed it in the forums previously. Just my $0.02