BenQ advertises the HT5550 as hitting 100% of the P3-DCI color gamut (with the WCG filter on). My pre-CMS calibration measurements did not bear this out. Except for magenta all the colors fell short of their 100% saturation targets. Red, green and yellow were the worst offenders ranging from 70 to 90% coverage and the oh so common linearity issues were also on display.
During my CMS calibrations, I was able to move the 100% saturation points out a tiny bit. If I moved them too much however, it would increase the linearity errors of the lower saturation points. Overall, I felt post-calibration image/color did look better than it actually measured through the HDR effect was low (even for a projector).