Frankly Wonko, I do not care if this makes any sense to you or not. As I said when I posted it I didn't think it up, it was stated by a well known ballistian who worked in the lab of a major US ammunition maker. Good enough for me & it made perfect sense.
The petals on most 28 gram wads are short enough to contain a 24 gram shot load so you likely have never even encountered the problem anyway
This was written primarily for those who shoot very light shot charges in a wad designed for a heavier load in their desire for "Low" pressure, such as 3/4 oz in a 1 or 1 1/8 oz shotcup.
If the shot does not fill the cup then a filler needs to be placed beneath it rather than allowing the cup petals to protrude beyond the shot.
