Good, I'm glad that you are familiar with HCFR. What sensor are you using?
Simply perform a full gray scale measurement (0->100IRE) and review the results. Whether there is any clipping at the higher IREs will be charted out for you. You want the gamma curve to hold steady at exactly 2.2 all the way from 0 to 100. Any line dipping is clipping (rhyme intended).
Instead of plugging in Lee's values, please consider walking your TV through an entire proper calibration. Yes, Lee's settings looked good my TV as well, but they were not perfect. Every same model TV is at least a little different. Decided to start from square one.
Here are my results of a calibration back in October using an i1 display2. I have since gotten even closer to perfection with subsequent attempts, but here's for your reference:
Reason for Edit: spellingEdited by KewlK - 3/3/13 at 10:48am