If a guy subscribes to the theory..........

Powder dispensers, whether mechanical throwers or automated scales or even balance beams are not perfect, so a charge of "44.0" might actually be 43.9 or 44.1, or maybe even 43.85 vs. 44.14, or maybe even worse. The range 1-4 is a prime example of where NOT to load, according to OCW theory, as the variability in charge weight will create greater variability in elevation. So the goal in this type of test is to find the "forgiving spot" where changes in charge weight make the least change in elevation dispersion.

Of course, if you're not shooting long range where vertical dispersion starts to matter, it really doesn't make a difference.

Moving from these, if you want to spend your life in load development, I'd load more in the range where the dispersion is flat, and see if I can tighten groups with seating depth. If they don't, then in theory, try a different bullet or even bullet weight. If nothing tunes, run a different powder to see if the "window" might match up with the velocity for the particular bullet (targeting the window where the velocity would be near #8 with that particular bullet).

Like I said - I don't necessarily subscribe whole hog to this method, or any other, not even my own. I find a load which shoots small groups, I shoot it. But I often go through the motions of ladder or OCW tests along the way to see if there's something I can learn to make them even better.