Home Forums Hunting & Shooting Hunting Optics EXTREMELY hard to turn Leupold VX-I (2-7 power)

Ive run into that on a vx II and III i sent one back they fixed it going to send the vx III back there is a screw that looks like a set screw on the knob i was told that if you messed with it you could damage the scope and it would void the warranty but i dont know if this is true im just going to it back