I don't think even the CO's know the rules many times.
I had my marlin 44 mag with me last year. Stopped walking out of woods (he drove down the field to me) show tag and caliber of weapon. Next he had me unload and count the rounds of 44 mag. I did and then pointed out that even though I had eight rounds was I not legal to have as many PCR rounds with me as I wanted. His answer was "good question".
I wondered about this. Also how many opinions/interpretations from the CO and dispatch would have to be sorted through before they cite you, erring on the side of caution, to let the court figure it out?