We blather all the time about our personal experiences that this scope never failed, that old Leupold friction adjust scopes hold zero, that SWFA scopes dial correctly, that NXS scopes can drive nails into a fence post be remounted and still hold zero but no one ever states what construction parameters are responsible for one rifle scope being more mechanically sound than another.

Why the hell does one stand up to more recoil, dial better, hold zero better than another? Does anyone know?