Eric, As implied above, shooting an Artillery at 800 meters, even with a stock, is optimistic. Usually you will only be shooting with the rear sight elevator (sliding part with lock button) all the way to the rear. If your pattern is low, push the elevator up to the next notch forward, until on target. If you find that the elevator is moving on it's own, on recoil, you may need a new lock button, which I have in stock, or the notches in your numbered scale may be damaged. TH
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