Adjustable Objectives (AOs)

[Zachary]

I have a few scopes that have Adjustable Objectives.  Actually, I believe that the scopes that have the AOs are those that have magnifications of 10x or more.  I know (or I think I know) that the AOs are there for reasons related to parallax.

In any event, since most of my shooting is at 100 yards, I leave the AO on 100.  However, one day I took a shot at the range at 100 yards but placed the AO at 300 yards.  Guess what?  Nothing different happened.

Do any of you use your AOs?  Have you found this feature to be practical?

Zachary

[swede7]

I have the AO's on two scopes, neither really for hunting, unless it's coyotes or fox, but I do adjust the objectives when shooting at the range to get any advantage I can and sort my way through mirage.

[BruceP]

Zachary someone can correct me if I'm wrong but the parallax movement only shows as your eye is moved slightly behind the scope; therefore if you had your eye in perfect alignment with the scope then there would be no parallax shift in you point of impact even if the AO was set to a different distance than what you are shooting. Also at  only 100 yds the shift should be relatively small. At least thats the way I understand it.
BruceP