Regarding the subject of round dumping-
Having shot major matches in five states, on both coasts, round dumping is called much more closely in the southeast than in the west.
I shot the California match last year and saw an amazing display of round dumping on virtually every stage. If that had happened in the southeast, the procedurals would have been flying. That difference is exactly the situation that created the after the fact penalties against an outstanding west coast shooter at the IDPA nationals two years ago. If he had been penalized on any stage, he likely would not have been penalized so severely after he was done shooting and had left the match. Having received a penalty on a stage, he would have been informed about the limits for that match. Shooting the California match for me was a disadvantage because the rules were not enforced to the degree I expected to encounter. Don't get me wrong, rounds are dumped in the southeast, just not as obviously as they are in California. And don't get me started on low cover. They don't seem to follow the one knee down or the both feet behind cover criteria.
The problem with IDPA rules isn't that there are too many. It is that there is such a disparity of application to what the book says. The LGB only needed clarification. The new book, in my opinion, created more problems than it solved. But hey, it is what it is. It just needs to be enforced consistently. The IDPA rules require judgment and interpretation of intent. That is where the mischief starts.
And now back to the subject-
Since no one other than the shooter can know their intent, round dumping is a call best left for the most obvious of situations. If that is too complicated, it should never be called. No one, other than the shooter, really knows what their intent was or their perception of what needed to be accomplished. A round dumping call disadvantages small calibers and poor eye sight. Now, the judicious application of insurance rounds does reward the shooter. There is no doubt about it. If there was no advantage, there would be no rule against it.
Watching a Master hit two zeros and then mysteriously miss, does create reasonable doubt regarding the purity of intent. Any other combination begs to award the shooter, the benefit of the doubt. See rule book.
It could be that the Master (or anyone else) decided that an insurance round was appropriate right before the reload, since they may have been preoccupied thinking about the next array. That's my story and I'm sticking to it.