The three-shell plug rule for duck hunting

If there is one federal waterfowl rule that otherwise careful hunters break, it is this one, and it breaks in the most ordinary way imaginable: somebody takes the plug out to shoot clays in September and does not put it back before the season. 50 CFR 20.21(b) plugged shotgun, 3 shells makes it illegal to take migratory game birds with a shotgun capable of holding more than three shells unless it is plugged with a one-piece filler that cannot be removed without disassembling the gun.

Read the wording closely, because two phrases in it do all the work. The first is capable of holding. The offence is about the gun's capacity, not about how many shells happen to be in it — a five-shot gun loaded with two rounds is still a five-shot gun, and the regulation is not interested in your loading discipline. The second is one-piece filler that cannot be removed without disassembling the gun. A whittled dowel that shakes out, a plug you can extract by tipping the magazine, or anything you can remove without taking the gun apart does not satisfy the rule even if it limits capacity while it is in place.

This is also not merely a federal matter in North Carolina, which is what raises the stakes. G.S. 113-291.1(f) federal migratory method rules apply: absent contrary Wildlife Resources Commission rules, the U.S. Department of the Interior rules prohibiting rifles, unplugged shotguns, toxic shot and sinkboxes in taking migratory game birds apply in this state, and a violation of those federal rules is unlawful under state law. One unplugged shotgun is therefore exposure under two systems at once, and a state officer does not need a federal counterpart present to act on it.

The specification of that statute is worth noticing in its own right. It names four things — rifles, unplugged shotguns, toxic shot and sinkboxes — which is a tidy summary of the method rules that a waterfowl hunter is most likely to run into. A hunter who has those four straight has covered most of the ground the federal method regulations occupy.

The practical failure mode is almost always seasonal rather than deliberate. Guns get unplugged for clays, for a different quarry, or for cleaning, and the plug ends up in a drawer. The fix is a habit rather than a memory: check the plug physically every time the gun goes into the truck for waterfowl, by dropping shells into the magazine and counting, rather than by recalling that you put it back. Do the same for anyone else's gun in the party, because the person who borrowed a shotgun from a relative is the person most likely to be carrying an unplugged one.

Buy or make the plug properly while you are at it. A correct filler is a single piece, sized to the magazine, that stays in place until the gun is taken apart — and they are cheap enough that having a spare in the bag costs nothing. If a plug in one of your guns is improvised, replace it before the season rather than reasoning about whether it technically complies.

Finally, the reason the rule exists is worth holding onto rather than resenting. Capacity limits on migratory birds are among the oldest tools in North American waterfowl management, dating from the era in which market-scale shooting was being brought under control, and they persist because they are a simple, checkable constraint on how much one person can take in a morning. A three-shell limit costs a decent hunter almost nothing and it costs the resource a great deal less than the alternative.

Capacity, not load. One-piece filler, not a dowel that shakes out. Federal rule and, through the state statute, a North Carolina offence too. Count shells into the magazine before every waterfowl trip and check the borrowed gun in your party as well as your own.