.223/.308 Marksman reticles are designed to be accurate when the scope in use is adjusted to the maximum magnification. The prominent center cross is used as the 100 yard zero. Once zeroed, the remaining hold-over aim points, out to 600 yards, fall into place. The reticle can also be used for 100m zero and with aimpoints out to 600m, by reducing the magnification accordingly. The distance markers are glass etched for your reference. Hawke has carried out the complicated ballistic math, so you don’t have to!