Part 3 of a 3-part series that I wrote because many people don't know how to select, mount or properly use a scope. Part 1 is about scope terms and how to choose a scope. Part 2 shows you how to mount a scope (I also made a subsequent video on scope mounting). Part 3 gives you the info to quickly and easily sight-in your scope. You might find it interesting to know that sighting-in a scope is one of the most-asked questions I get. Don't make it harder than it is! Another scope-related article is, "What does AO mean?" Plus, there are some special issues for some guns and scope. I address those in this article about scope shift and barrel droop.