Sighting in a rifle is a skill — one that takes time to develop — and one that can be made much easier with a few tools.
Boresighting is the process of lining up your sight with the axis of your gun’s bore and is a critical first step in sighting in your scope. Boresighting creates a starting point for you to sight in your gun, and the more accurate that initial boresight shot placement is the easier it is to get on zero.
It also saves time, ammunition, and some wear and tear on your shoulder.