Think of the light supersonic loads as a regular rifle round, out to about 200 yards they don't act much differently that a .308 winchester. Think of the subsonic rounds like a pistol caliber carbine in terms of performance, except for the much better ballistic coefficient of the rifle bullet, that's what it is. The trajectory chart looks a lot like that big arch out in St. Louis. The long heavy bullets retains energy and velocity very well, but it didn't start out with much either. Unless you are putting a suppressor on it, the light fast loads are the way to go, but the subsonic stuff is fun to play with and really quiet even without a can.