First I clean and oil all the parts including the screws.If it's a new gun I clean the whole thing.Next I set the eye relief with the scope nice and loose.I then put the gun in a gun vise and get it dead level.Next level the scope and snug it down.The reason for this is to insure the vertical crosshair is aligned with the vortex of the bore.Recheck again and finish tightening the ring screws.Bore sight it and you're ready to hit the range.