Winchester BOSS settings 300WM

Got a nice used Model 70 in 300WinMag with the micrometer-calibrated thingy / compensator at the muzzle. The manual has suggested settings for 180 (@ .2) & 200 (@ 2.9) grain bullets; I've had good groups with the 200 setting but want to try some 175, 168, & 165 HPBT's & am curious if anyone is willing to share what they've found work's.Winchester's manual (website) hasn't been changed since Sprimg, 1997.