I think he is lying, but...
Consider the difference between loading the shells at the range, on a sunny day, having a good time with your buddies, no stress, no time limit, no enemy vs. having to do it in the dark, under stress, adrenaline flowing and a guy who might want to kill you lurking nearby.
That’s why people who get a weapon for home defense need to train for home defense, not just go to the range.
Dude, read that crap just a little closer.