Now you're crawfishing. The stated parameters were for a home defense shotgun. That assumes INSIDE the home. Either it works, or it doesn't. Which is it?
Ah, to hell with this verbal jousting. You can believe what you choose. But I've seen the results of a load of #6s and #7.5s delivered across a room (20 feet max). It is devastating.
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Not everything is black and white. I did some thinking about it, and decided that it wouldn't be a terrible option, especially if you're concerned about over penetration. Not trying to start an argument.