[QUOTEGAME BIRD
It is unlawful to
hunt any game bird using
a
shotgun in which the magazine and chamber combined will hold more than three rounds of ammunition,
a trap, or
bait.][/QUOTE]
It's not just a limitation of three rounds in a shotgun. The shotgun must be plugged to not allow any more than two in the magazine and one in the chamber.
To my knowledge there are no two round magazines for a .22
Don't read into the regulations what isn't there