The recent thread on 7.62x39 drop got me thinking about battle zeros for my various rifles. The following are a few battle zeros I've picked up here and there. Do any of you guys know any more? How about 7.62x54R? 7.62x39: According to the above thread, a 20 yard zero will cross over again at 200 yards and will give you +/- 3.5" out to 220 yards or so. 5.56x45: According to this web page, the "IBZ" 50 yard zero will cross over again at 200 meters and will give you +/- 2" out to 250 yards or so. 7.62x51: According to this thread, a 25 yard zero will cross over again at 200 yards and will give you +/- 2.5" out to 225 yards or so.