Yesterday we shot 168 grain Sierras at 2700 fps at a very long distance. From the 100 yard zero I cranked the 16X MK4 exactly 65 minutes up, had to use 16 minutes of wind. We hit a rock that measured 20x18 inches after several tries. We walked the bullets out to the target rock - actually saw the bullets hit it but they did not do much to the rock. Had 10 steel plates at 700 and we worked them over with seven different rifles, several were sporter weights. The heavy barrels clearly did better but we got respectable hit %'s with the sporters. Lots of good optics which help a lot.