30 round magazine in an AK work?
Because I live out in the middle of nowhere, I load with #4 buck for pellet density.
A friend in the middle of town and 4 kids loads with #8 birdshot...........I really disagree with that, but he says the farthest shot he will ever take in his house is 25 feet. And if the first shot doesn't stop him he's got 4 more in the tube and he can probably confuse him until it does stop him. 
That's a cool theory. There are other theories out there about how a pneumothorax, hypovolemic shock, and physical systemic failure can also stop someone. But not kinda stop them. Mechanically stop them for sure, whether they want to or not. If we can stop someone by hurting them a little or by confusing them, then I'm all for it. But if that's the case then it is taser, pepper spray, or strobe light time. Not gun time. If it's gun time then it's lethal force time, not lightly annoy and confuse them (I.e. nonlethal force time).
Forgive me for being snarky

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Eta: 30 rounds in an AK
will work. Fact. You are also my hero for choosing the AK over the AR

. Urban legend has it that sometimes just yelling "wolverines!" Is enough to make most home invaders flee without ever firing a shot from ones AK. I consider this a plus.