I know that this is something I have done wrong but cannot figure it out. I have two differant scopes mounted on two differant rifles, my problem is i have trouble seeing through them i have to constantly move my head around because my veiw is either blacked out or i can only see the tube. Is this from scope to far forward to far back do i need a cheeck rest or just spend more than $500.00 for a scope. I have been working on this for a couple of weeks now and i am lost. Sometimes when i first look through my scopes it is ok but as time goes on it gets worse (10-20 rounds)