Larry;
You make some very good points there. I think the answer here is, that even those B class shooters which are averaging 90-91% are still quite good shots, though not up to the absolute top yet. However it would also seem that most of the misses were not due to a properly centered pattern failing to break the target, but were either missed or fringed. The fact that from the 3/4oz 28 all the way up through the 1 1/8oz 12ga only a 3-4% difference shows does indeed reflect there is not that much difference in pattern spread or distribution between them. As the shot load gets heavier it will pick up a target or two in the fringe that the lighter charge failed to break, & some part of those unbroken may well have just been totally beyond even the fringes. As the range increases & becomes more difficult you would see the lighter charges dropping in their % of breaks at a faster rate than the heavier charges, & it would not really matter whether that 3/4oz load were fired through the 28 or a 20, effect would be based more on the wt of shot than size of the hole.
