Out of all the rifle accuracy problems that apply directly to the customers scopes I have checked over the years, the problems directly relating to turrets and dialing failures.
1- NightForce only one, the guy fell in the mountains and bent the top turret oval in shape making a hard spot while dialing, but the scope still worked and dialed correctly, sent back to NF excellent warranty and fast.
The other scopes are not in the same playing field.
2 Leupold Vx5 & Vx6 and Zeiss V6. For these scopes dont lose your paper work and make sure you register your scope online for the warranty, you will need it !!!!!!!!!
3 Vortex ( **** )