I'm not a handgun expert at all but I've caught a few of these, like the guy who racked the slide on his revolver. The author who really impressed me, although not with his handgun knowledge, was Tom Clancy. I was in the anti-submarine warfare business in the 1970s and some of what he wrote in Red October I only knew from classified sources.
Precedent: A 1944 science fiction story accurately described an atomic bomb – so much so that it prompted a visit from the FBI to the NY office of Astounding Science Fiction. Definitely a point of pride for editor John W Campbell.
https://en.wikipedia.org/wiki/Deadline_(science_fiction_stor...
Until it came to anything vaguely to do with computing or electronics, which turned into basically magic
There's a rumor that Reagan very seriously asked his admirals repeatedly if it was true. I know he "couldn't put it down."
Tangentaly related observation, but Reagan may have been the only president to really pay attention to movies and entertainment for inspiration of future events, and possibilities. It was said that he had a similar reaction to War Games, and took it very seriously
Didn’t he piece rumors and made intelligent guesses so well that the government freaked out wondering where the leak was?