My new Vortex PMR 34mm seems to have bad threads. I know Vortex warranty will take care of it, but I'm not sure if I should ask for a replacement screw a new set of rings. One of the screws had significant resistance when I backed it out to mount the scope. It also had resistance going back in. The other three screws all turned easily (until they were tight, as expected). I pulled the difficult screw all the way out and the threads are shiny. I'm not sure if it is a bad screw or if the rings were not tapped properly. If it is just a bad screw, would the bad screw damage the threads in the rings? Any thoughts on what to ask for when I call Vortex?