Would like to counter the hamster argument with positionals .... try it without a hamster in a more traditional 'hunter' stance, rather than the target shooter stance, may find that suits you better.
close ones, px is the devil. Centre your ret on the target then try and lock down your stance and circle the target by moving your head. If you find the ret isnt in the centre of the circle, adjust then try again. If the circle has the ret in the centre of the aimpoint, yer in