Strange v5 Joystick

I was testing the v5 controller today and I found that the v5 controller joystick output could be x=127 and y=50. This means that the v5 joystick has a radius that is larger than 127. However, the most that the joystick can return is 127, not its true value. I was wondering if there was anyway to get the true value of the joystick.