Moving the sight further forward will give you a longer sight plane and make your sighting more accurate. Think of it this way, if you had open sights on a rifle and they were two inches apart it wouldn't be very accurate. Each time you move the gun you wouldn't see much movement in the sights. If you moved the front sight further out (the same as moving your pins further out) any movement of the gun would be much more noticable while looking thru the sights. By having your sight further apart (assumming you have a peep sight) you should be more accurate......