The human factor is way to much a wild card for anyone to predict how a bullet i going to work on another human being.
Agreed.
Same with knives - I think about it every time we see a post about the slew of couch ninja kids claiming, that they hold out their left arm to be sliced as a defense and then use their other hand to wield a knife or gun. 100% BS.
Its all braggadocio until the slicing or the shootings starts, then its a chaos of screaming mad panic with lots of flailing of arms and running and most likely over so fast, no one knows what went down.
Most wont be able to stand seeing themselves being wounded and some seemingly strong willed persons will cave at the sight of blood - let alone a sucking chest wound or a sliced body part. Other seemingly weak are able to stand being wounded and persevere - one just never can tell.
As for wild card and overcomming odds in WWII - I remember reading a first hand account about a German soldier being severely wounded during the retreat through Russia.
He was captured by russian forces and forced to kneel with his comrades. All were then shot in the neck or directly in the back of the head. Maybe by a Tokarev bottleneck 7.62x25, who knows - he didnt turn and ask prior to being shot in the head.
Anyway, the German woke up many hours later in the frozen wasteland amongst the cold stiff bodies of other German soldiers. He had a blinding headache and his bloody cheek was frozen solid to the ground due to subzero temps.
He assessed the situation. It turned out the projectile when fired, had travelled round the curvature of his cranium and exited. The soldier then started walking towards Germany and actually made it home. No doubt some luck and tremendous will power played a factor.
As for the whole 10mm, 40mm and then going back to the old 9mm - what a joke. Actually I kind of like the 10mm for venerable and historic reasons but evidently some couldnt handle the recoil of the 10 - nor the 40mm for that matter. Dont get me started on the 357 SIG.
There is a constant search for THE caliber and some tend to frown at for example the .38 SPL. Its a wonder law enforcement for generations made do just fine with the .38 - they must not have known it was inferior.
The .38 is one of the more underrated calibers out there.