Re: Independent tracking system....who else has it??
Scope adjustment tracking is really dependant on the way the erector tube is sized, against the size of the bearing surfaces of the elevation, windage, and tension spring.
On poorly designed units, these bearing surfaces are undersized, allowing the erector tube to slip over/past one of the other bearing points.
As an example let's say we have the erector centered, then dial in 100% of the down elevation.
If the assemblies are correctly designed nothing happens. If the surfaces are too small proportional to the erector diameter, the tension spring will "ride up' the side of the erector tube, trapping the erector and giving both the elevation adjustment you wanted, and an unplanned windage adjustment.
Once your scope does something like this, you correct by backing out both adjustments to their outward extreme ( up for elev and right for windage) and then recenter the reticle, and rezero the rifle.
In newer designs this almost cannot happen in all but the cheapest scopes. Weaver just points out that they properly designed their scope and use that information as a very good marketing tool. [img]/ubbthreads/images/graemlins/smile.gif[/img]