Sighting in your rifle is essential to achieving practical accuracy in the field and on the range. The process of sighting in your rifle also called zeroing, requires an understanding of marksmanship and sight adjustment fundamentals.
When you aim a rifle, you use a sighting system, such as iron sights or an optical sight, to align the barrel with the intended target. The point of aim is where you align your iron sights or place your sight reticle on the target. The strike of the bullet is the point of impact. The purpose of sighting in or zeroing is to cause these two elements to coincide at a specified distance. That way, where you aim is where you’ll hit.