Only talking out to about 600-700 yards. I may be wrong but the consenus seems to be that a fixed power scope of 10X to 16X with a lot of turret elavation is the best setup. I understand the heat waves and mirage argument but most big game hunting is done in cooler weather. Is this the only reason? Why wouldn't a 6-24X variable with mil-dots work better because of the sight picture and not the need to count clicks and the crosshairs actually moving? With mil-dots you wouldn't have to worry about elavation range of the scope. Looking for an education not an argument!