And this person can't be dealt with by anything like a Glock 26, Glock 43, S&W Bodyguard, Sig 365, Ruger LCP, Any J frame revolver in .38 special or even .357mag? Six or seven shots of 9mm or .380 is not going to solve a close encounter of the ugly kind with that person who is not thinking and acting rationally and has no regard to the consequences of assaulting you?
Real life is not the Walking Dead and mowing down ranks of zombies while getting gas. Nor is it armed resistance to Chinese paratroopers while yelling 'Wolverines' while standing ankle deep in warm brass. The gun industry has done a superlative job on selling fantasy to the guidable masses of gun nuts with more money than common sense. Of the people that I actually know personally, who've had to pull the trigger on another person, to include myself in Washington D.C., none of them used more than three rounds. My own shooting situation was over in two shots. The one I witnessed first hand outside Gaffney's Irish Bar on the corner of 14th street and Colorado, was over in three fast shots from a RG.22 revolver. My own sister, Anne, had to shoot in 1978 in Baltimore Maryland, and it was over in two shots. My own son, a Montgomery Country Police officer, used two rounds rounds of 9mm and he said the second one was unneeded, but they were trained and he practiced so much with a double tap, that he did just automatically did what they practiced.
All the years living in and around D.C. in areas of higher than normal crime, I knew people who had to use a firearm, sometimes not within the overly restrictive anti gun environment. They had to run from the scene as much as the accomplices of the would be criminal. None of them ever needed more than a few shots at a very close range, in a few seconds. Then it was all over one way or the other.
I don't go by gun magazines but what goes on in real life. I'll leave the massive shootouts to Hollywood.