First, get behind the rifle and move your head around until you have a full field image in the scope. My guess is that you will need to move your head rearward to get a good scope image at min power. If this is the case you could move the scope forward, or increase the LOP if you have an adjustable butt stock. You may need to play a bit with the scope location, but you should be able to find a position that allows you to see clearly at min and max power, with only minor adjustments to your position. Check, sitting, kneeling, prone, any position you expect to shoot- they will all subtly affect your head position.