Sighting-In Your Rifle With 2 rounds...
http://www.youtube.com/watch?v=TiOpQY2ORo4
Vortex Optics’ Method of Sighting, Parts 1 & 2:
http://www.youtube.com/watch?v=91t9rNIUYYI&list=PLDDF957EFA89B011E
...and Eric & Jed’s Way...
http://www.youtube.com/watch?v=p9JLLwLysRo&list=PLDDF957EFA89B011E