SS, thanks for the info. If I understand the workings of the Bplex though, the trajectory is calibrated at only 9X power, while the B. mill dot is calibrated for about 14x. I know the B. mill dot has more trajectory range than needed for the HMR, but if one zeros at 100 yds, and assumes the BDC at 50 yd increments instead of the usual 100 yd increments, then the BDC is very close to the published .17 HMR trajectory out to 300 yards. Has anyone else made these comparisons, or even better, has anyone mated the Ballistic mil dot to the .17 HMR?