Q:

I have a martin cheetah and im having trouble sighting it in i put vital gear sights on it (3pin)and my 3rd pin down is dead on at 10,20and 25 yrds cant get my top pin lowerd enough to hit at 10 nor 20 yrds aand i think even if i lower the whole sight all the way i dont think it will be enough if neone understands whati just tried to explain plz help