Zeroing a scope is the act of aligning your POA ("stage of goal", Whatever you're aiming at) and also your POI ("point of influence", in which the bullet fired out of the gun is hitting) at a certain distance. The BDC reticle is the less difficult of the two. The https://adjust-gun-scope39382.oblogation.com/26750960/a-simple-key-for-white-light-optical-sights-unveiled