I know about parallax and its effects. On a scope with an adjustable objective how do you use it to correct the problem. On the scope I have the objective has been marked off for different yardages but if you set the scope for a certain yardage all you get is a blurr. If I don't pay any attention to the markings and just dial the objective to get a clear sight picture the yardage markings are way off. Is this normal or is it me or the scope. It is a Simmons by the way and other than this it seems to be a good scope. It has held up to a 30-06 for many range sessions. THANKS