I have shot a several different clubs and none follow the division capacity rule. I was always under the impression, and I could be wrong, but when shooting the classifier, division capacity restrictions and concealment garments are not required. The only time those rules are enforced is if the classifier is being shot as part of a match.
Using 3 mags, this is my load for the classifier;
Stage 1
9-12-9
Stage 2
12-6-12
Stage 3
7-13-10
I'm not sure how the club I shoot at handles this, I know that rules call for division capacities on mags for the classifier. Thanks