Vortex viper HD 3-15x44 Parallax issiue

[Goodson84]

Just received a replacement for warranty issue. The new scope is mounted on a HOWA Mini 6ARC. Issue is I can torque the forward rings over 10 inch lbs or parallax started binding up. Recommends 18 inch lbs but can get over 10, torque to 11 and starts binding up. I did torque rear rings to 18. Anyone had a similar issue?

 

[nm.otter]

What rings? Sounds like something might be off.