If a new rifle is only good for a minute of angle at best and one fires a ladder test at 400 yards, how does one know any bullet hole is at the top or the bottom of the rifle's group ?
Should one fire three or four of each amount of powder at 400 yards?
Firing 3 or 4 of each powder increment would be an OCW test rather than a ladder test.
You don't need to go to 400 yards for OCW, 100 yards works fine.
Choose one test or the other. If you don't know the difference, it's harder.
