Don't forget that it's not all distance it is also sub 1 inch accuracy. The ability to peel a bad guy off a good guy in the close confines of urban territory and ranged from 25 meters to 300 meters as an operational space is imperative. Another also under appreciated element is penetration and sustained velocity of a round through at least some type of material. Whether it be glass, or plaster sustained effectiveness beyond the first surface for urbanized terrain is important.