Yes. If one wants to drive nails at a variety of distances with high power scopes, then parallax is something to be concerned about. To date, I've only used AO units and even have them on my 22LR ground squirrel rifles. Makes a real difference especially when one is using a variety of positions in the field. Half and inch of error at 100 yds is enough to affect a miss.
Last edited by 1minute; 03/28/16.
