If you look at the wording in the Alberta Wildlife Act, it specifically states that you can't use a shotgun that is "capable" of holding more than three rounds in the magazine/chamber combined. It does not state that you can't have more than three rounds in the shotgun. So whether you actually have three or four rounds in the shotgun, doesn't matter, all that matters is that the shotgun you are hunting with is capable of holding more than three rounds of the ammunition that you are hunting with. So if you choose to hunt with short shotshells that allow you to load more than three rounds, according to the wording of the provincial legislation, you would technically be in violation. If you don't have short shotshells, and you can only load three of the shells that you do have with you in the shotgun, it would be perfectly legal. And with semi auto rifles , the magazine can only be capable of holding five of the rounds that you are using for big game, the federal exemptions do not apply , as far as the provincial legislation is concerned.