No, the scopes are fine. They are adjustable for parallax. It's just that irons aim so much better than you think they can. Even for guys with mediocre eyes - like me. Paul Matthews once set out to test what the aiming error is with iron sights - it turns out to be about 1/4 of a minute. While a scope might beat that, it becomes relatively moot in comparison to the target and the accuracy of the rifles and the ability to hang with the conditions (that last one is the killer).
