This is updated post about zeroing of the firearms.
You finally have the rifle out of the box and are anxious to shoot it. You cannot wait until you get to the range. Once there you set up the target, the silhouette at 25 meters looks close enough where you could throw a stone and hit it. You fire a round, scope it, and see that it missed the black. You try again and same placement. You move the weapon and find your shots are even farther from the black almost off the target completely. You blame the weapon and yourself. However, you may not realize that you have to adjust the weapon to you. The weapon may or may not have come from the factory with a mechanical zero or what some may call a battle sight zero. You have some adjustments to make.
Our club organized “Classifier International Marathon” rifle competition when clubs from different countries organize competition in one day. All clubs have same stages, so you can participate in competition at home and compare your result to results of shooters world wide. Very interesting idea. I was Range Master today.