Hi Nodak, the "Cheers" postman was named "Cliff." Which brings to one of the facts that he would blurt-out: Maximum Point Blank Range means the elevation and drop within 2-3" up and down equals MPBR. Much beyond MPBR, most shooters get lost in the abyss of gravity, related to trajectory. Six hundred yard "Newby Hunters" will find gravity as an enemy of accuracy. When a bullet starts this decent into oblivion, only the quarry suffers, or is lucky to be cleanly missed. As previously-stated, only the special few well-practiced shooters can actually hit their intended target at 600 yards. Cliffy