Without getting off topic, since I haven't watched you videos yet... Here are my .02 Cents on semi auto handgun calibers:
... They all suck at killing what you're shooting at. Even the weakest 55grn .223 still has almost 3 times the power of .45ACP. I say choose what you can shoot well and hit with... and leave it to the guys with big heads
@Rossignol to argue about what caliber is best
Indeed, there is a video of a One on One Police shootout with a suspect. There were multiple magazine reloads by the police officer who finally killed the bad guy with a head shot. The Police officer assumed he missed the guy for like three clips worth(and yes I'm using the word clip, get over it) ;-)
In the end, the guy had been hit 17 times with a .45. Finally got a real hit on the CNS and stopped the guy. I'm thinking in the old days when a cop had only 6 shots, he may have been more inclined to aim a bit more, but I don't know.
I'm very cognizant of the fact that I normally carry a DA only J-frame with 5 .38 +P rounds and that I will have to slow down and make them count.
One good 9mm is better than 16 poorly placed .40's or .45s.
I spent decades working on Ambulances(Paramedic), in ER's/ICUs (RN) and Operating rooms at the level of Anesthetist at the 2nd busiest hospital in the country and one of the most violent cities in the US. I've seen a whole lot of people die and a lot more survive. I've seen them all the way from the ones who never get to the hospital because they are DRT(Dead Rite There), to the ones who are successfully or unsuccessfully brought to the hospital, to treating them with hours of surgical intervention/resuscitation and treating them post operatively. Or bagging and tagging and wheeling into the morgue. The only part I haven't done is shoot one, hoping to skip that experience in this lifetime.
Highest ranking killers IME? AR, AK, Mini 14, shotgun, some other weird ones like Hunting rifles(.308, 7mm, 270, etc)
Lowest ranking? ALL handguns, not very efficient killers in most peoples hands
Intra-oral 12 ga, real crowd pleaser there...
I'll never forget the first guy I saw killed with a Mini 14. He was shot within 10-20 feet or so dead center in the chest, and that was the end of that. Barely any blood at all. Most handgun encounters are not fatal. Maybe 30% or less
An AK is very devastating no matter where it hits you.
I'm making a study of these things presently/personally because I am thinking of putting together some Brown Bear defense weapons for an Alaska fishing trip.
Shotgun with Hardcast slugs is on my list as are the S&W 460 Magnum and Glock 40 MOS in 10mm, all will be Hardcast projectiles
And to the OP, thanx for the Video series, you spent some time here.