In the process of zeroing the scope in I noticed that I can adjust the elevation of the scope up but can't set the adjustment down as far as I need to go in order to be sighted in. This is the first time I've noticed the problem and have yet to do anything to fix the problem. Also, this scope is at least 30 years old
Optics - Leupold - Rifleman Rifle Scopes BHK290
Answers & Comments
There are a few things that it could be. Make sure you have the scope mounted with the elevation screw on top and the windage screw on the right side. Next, carefully check the distance of the scope from the receiver. If the mounts aren't exactly the same, the scope could be tilted upward. Try switching the front and rear mounts. Make sure you don't have either of the mounts on backwards. Make sure the scope is built for the caliber you are shooting.
If none of these fix your problem, Leupold scopes are guaranteed for life.