Actually, I was told the same thing by a Game and Fish officer, when I asked if you could hunt with a 30 round magazine in your AK (you can in ND, but "If you need more than the first couple of rounds, you need to re-zero your rifle or you need some range time.")
@Smokin Joe There has been a federal limit on how many shells a shotgun can hold that is used to hunt ducks and geese,and nobody seems to ever mention this.
It happened as a result of the "Market Hunters" of the 1930's that would literally kill hundreds of ducks and geese every day.
Ironically enough,most of those geese and ducks were killed with either double barrel shotguns,or semi-autos like the old A5 Browning that only held 5 shots.
They were able to do this by shooting multiple guns,and even using tame geese and ducks to call in the wild ones.