His findings don’t surprise any, I have known enough BGs in my time, couple that with things in police reports about guns malfunctioning in the course of a crime. These people (BGs) get their information mostly from Hollywood. Some of the guns I have seen had taped up handles, I once saw a 22 revolver that you had to turn the cylinder by hand to get a fresh chamber, cocking it or pulling the trigger wouldn’t move the cylinder.
I have known some to carry blank guns others that only had 2 or 3 rounds in the gun. I asked what if it goes bad, the standard response was, get out of there ASAP.
The average BG doesn’t shoot his weapon, he just shows it to get what he wants, he will play with it rack the slide thinking this is the same as a function test like firing it, it will make him think it is fully ready, but in the middle of a conflict it fails.
I have been around guns all my life but I found out just recently the woes of repeated chambering, I had 6 out of 25 of my carry rounds that didn’t work as designed, 4 never went off and 2 were hang fires. I am just glad I didn’t find this out in the middle of a gun fight, especially since the first one didn’t go bang.