I definately read that the FBI adopted the 10mm, but they quickly determined that many female agents could not handle the recoil. The 10mm. This lead to the .40.
You may very well have read that. I've seen it several times myself. But it's not true no matter how many times it's been printed or repeated. Things don't become true simply because they're repeated frequently. The FBI never issued full power 10mm ammunition and therefore there was no opportunity for them to find out that "many female agents could not handle the recoil."
The FBI had no part in developing the .40S&W, in fact they continued issuing 10mm pistols for some time after the .40S&W became available.
As for the shoot-out, autopsies did show that some 9mm rounds were on target for vital organs, but they didn't penetrate deeply enough.
No, there was only a SINGLE 9mm round didn't penetrate
deeply enough in their estimation and they chose to focus nearly exclusively on that single circumstance. Ironically, based on the autopsy information I've been able to find, it seems that the round probably penetrated enough tissue to meet the FBI recommended specification. The reason it didn't quite go deeply enough into Platt's chest wasn't that it lacked penetration but rather because it had to penetrate several inches of Platt's upper arm and then enter the chest already expanded.
As for my stating that LE agencies are going back to the .45, this was an article, in a gun magazine,
written by (I think) a LE agency.
First of all "going back to the .45" incorrectly implies that the .45 was once the most popular round in LE. Most officers were carrying .38 spl or .357Mag revolvers when the high capacity autopistol began to make inroads inot LE. Initially, high capacity autopistol was more or less synonymous with 9mm but the development of the .40S&W changed things. So before we even get into whether or not LE is switching to the .45, it's important to understand that it's inaccurate for anyone to say that LE is "going back to the .45" because they were never
there to begin with.
Ok, with that said, there may be an LE agency (or even several) switching to the .45, but I'm not aware of any evidence of a general trend in that direction. If you have some evidence that supports such a trend I would be interested to see it.
There is nothing wrong with my thinking... Did I not think that a human being, with his on skill sets, etc. would be the one pulling a trigger?
The point is that there are many things that will play into who wins and who loses and it's unlikely that the calibers chosen
will play a part.
When a person starts talking about shooting it out against a 10mm with a 9mm it's demonstrating that how they are thinking about the confrontation is fundamentally flawed. It's roughly similar to asking a football coach which brand of helmet you need to pick in order to win the superbowl. Could it possibly play a role? It might, but it's not what really makes the
difference.
In a document on caliber selection, one FBI expert made comment that when picking one service pistol caliber over another, caliber choice might make a difference in 1 shooting out of a hundred in terms of terminal performance benefit.
We like to pretend that what gun we pick or what caliber we choose is going to make us safe or give us a significant advantage. It simply isn't true. That is the result of not thinking straight. It is the result of not
wanting to take responsibility for our own safety.
In ancient times warriors often believed that their weapons were imbued with supernatural powers. While we are above talking about a weapon's supernatural powers these days, we can't leave the basic concept behind. We still want to believe that our weapon will save us. It won't. What will save us is our skills and mindset--the product of our practice and training.
Pick a reliable weapon--there are a huge number of options out there that will serve admirably. Pick a caliber that will penetrate to FBI recommended depths with expanded ammunition--any service pistol caliber, including
9mm, will do the trick. Then spend your money, effort and time on practice, learning and training.