I think Formid is right in his analysis. IIRC he states that the reason more scopes aren't built to hold zero is because most people don't demand it (don't shoot that much). I wish they did too.
I don't know how to demand it other than moving away from their scopes. FWIW my last 4 scopes have not been Leupold. While I personally haven't experienced a failure other than failure to track correctly, I have read enough to turn me off.
