@bad ninja
True that 9mm FMJs can over-penetrate ... in and out. But that's manageable. The bullet type matters. The tiny .22 round into the skull is extremely effective. A lot of bad guys ... and victims for that matter ... have met their end by taking a single 22, 380, or even a 25 round. The Israeli Mossad carried Beretta 22s for a long time. So did the Mob. As they say, two shots behind the ear and ain't nobody gonna see Pauly no more.
The FBI preferred capacity over caliber because the data says cops under duress miss the target 20-30% of the time. And penetration is better with a 9mm vs 45. This has been debated to death along with 9mm vs. 40.
I like the .45 not because it's inherently better than 9mm. With the right ammo, it does create a nasty wound channel. No matter what size bullet... if a vital organ is hit, it's game over for the bad guy. So is a bigger bullet more effective? Probably sometimes.
I think the bottom line is a lot of people shoot better with a .45 because the guns tend to be better. Not the ammo.
Yes shot placement is key, but in a heated situation you aren't going to rise to the occasion, you will fall back to your training.
Most cannot train enough to guarantee a head shot with a .22 in a real world self defense scenario.
But a torso shot? That's doable.
Carrying a .22 as a SD weapon is pants on head retarded.
Shooting an unsuspecting victim in the back of the head isn't self defense.
Israeli carry with an empty chamber, especially with a .22 is suicide unless you have a team of pipe hitters backing you up.
Mossad doesn't carry .22 pistols into a firefight. That's a myth.
Over penetration is a real concern in a public environment or inside an occupied dwelling for a citizen that doesn't have Qualified Immunity, government and union attorneys.
9mm was originally ditched by the Feds because it lacked stopping power, which gave rise to the .40, which was ditched because it hurt the LEOs dainty little hands when they fired it.
I shoot a shitload of 9mm and love the round.
It has its place, but the facts just don't lie.
There is no replacement for displacement.
Bigger bullets make bigger holes.
Bigger holes mean faster blood loss and more internal damage.