The HDs are what I am running on my 26.3. With 147gr, I am hitting the top edge to a couple of inches above the black B8 bull using a 6 o'clock hold on the black at 25yds. Lighter bullets at higher speeds hit a little lower. Thinking of switching to 124gr bullets for it. 15yds and in, I'm driving the dot and hitting just where i mean to, regardless of bullet weight.