Gathering data on my 18" AR. 223 wylde, Leupold 3.5-10, Frontier 75gr. ammunition.
Everything's great at 100, 200, 300, and 400. Even turned in a 2.5 inch 3 shot group at 400.
However, at 500, the wheels fall off. The group opens up to 7 or 8 inches and is offset about 1.5moa to the...