Starting from the left, I would say your number 4, 5 and 6 were the node. See how the center of each group is so close?

The last load jumped higher, and the others were moving from low to high, until they stabilized the most between 4, 5 and 6.

Pick load number 5 and you will have a very consistent load at multiple pressures, and many things can affect pressures, from heat to case capacity inconsistency, different lots of powder, variations in charges, etc.

You may not shoot bugholes, but you will have a very reliable load. But, you could.

My OCW was alot like yours, then I shot this at 200 yards with my 7mm rem mag.