Sighting in a scope is the process of aligning the reticle of a telescopic sight with the point of impact of the firearm it is mounted on. The reticle is usually a crosshair or dot that is used to aim the firearm. The point of impact is the point at which the bullet hits the target. Sighting in a scope is important because it ensures that the firearm is shooting accurately. If the scope is not sighted in properly, the firearm will not shoot to the point of aim.
There are a number of different ways to sight in a scope. The most common method is to use a boresighter. A boresighter is a laser or optical device that is inserted into the barrel of the firearm. The boresighter projects a laser or optical beam that is aligned with the bore of the barrel. The firearm is then pointed at a target, and the scope is adjusted until the reticle is aligned with the laser or optical beam. Another method of sighting in a scope is to use a lead sled. A lead sled is a device that holds the firearm steady while it is being fired. The firearm is fired at a target, and the scope is adjusted until the reticle is aligned with the point of impact of the bullet.