I am fixing to get into long range shooting, and my question is do adjustable objective give you a substantial advange? Im not competing or anything, just shooting for fun. I want an 800 yard gun, probably a .308, in the near future. I am also looking to top my AR-15 with a 4.5 x 14 scope, maybe a sightron I was looking at, but I would rather it not be AO unless you guys talk me into it. Thanks for the help.