Primary and Secondary is a good podcast. There is a lot of truth in Chuck Marsh’s commentary there but I think some of that commentary reflects his experiences and not everyone’s experience. The truth is, you can drill a guy 15 times and depending on SHOT PLACEMENT, he may not immediately go down. The history books are full of walking dead guys who took lots of folks to Valhalla with them. If you don’t hit CNS or get a psychological stop, then the guy has to bleed out and that may be 10 seconds or 10 days depending on a variety of factors.
On a semi-related note, take a look at this article on structured barrels. I’ve got zero experience with it; but if the claims are true it makes the targets for barrel life, rate of fire, and accuracy a lot more realistic.
https://www.thefirearmblog.com/blog/...-every-aspect/