I'm gonna say you are wrong. I think the only time magazine capacity is restricted is when dealing with waterfowl.
but I could be wrong, so I'm curious what others will say as well.
beat me by mere seconds
3rd. limit in shotguns for Quail? Please cite your reference.
Magazine Plugs
When hunting for migratory game birds
and waterfowl (i.e., doves, ducks, geese,
woodcock, etc.), it is illegal to use a shotgun
capable of holding more than three shells,
unless it is plugged with a one-piece filler
that is incapable of being removed without
disassembling the gun.
There are no restrictions on magazine
capacity for hunting of any other species.
So we've learned here that "I heard it somewhere" and "I seem to recall" aren't the greatest sources of facts for us.
3rd. limit in shotguns for Quail? Please cite your reference.
don't forget turkey has a 3 round limit also