Google AK manual, that will tell you how the Russians do it. How I do it. If you have 7.62x39 set rear sight at 200m. If you have 5.56 or 5.45 place rear sight leaf at 300m. Place target at 25m. That will get you a rough zero. Then move target to 100m, and rear leaf sight to 100m. The key is assuring you have the same hold for each shot. I take bright colored duct tape and place a large plus sign on the target. By lining up on the horizontal and vertical lines I get the same hold. You want your POA and POI to line up under the tip of the front sight post. Once you are zeroed at 100m then the rifle is zeroed. Groupings should be around 3 to 5MOA. Move rear sight leaf to battle position which is equivalent to 300m. Your POI will now be high sub 300m, so your POA should be just above the front sight post from 0 to 300m.