So all of sudden you're more intelligent that people that understand the human body and saves lives with that knowledge? k
https://pistol-forum.com/showthread.php?4328-Basic-Wound-Ballistic-Terminal-Performance-Facts
https://pistol-forum.com/showthread.php?4337-Service-Caliber-Handgun-Duty-and-Self-Defense-Ammo
In the last decade or so, ammo engineers have produced a superb generation of 9 mm projectiles that offer penetration in the ideal range and that are capable of good performance after common intermediate barriers. As many agencies are discovering, modern robust expanding, barrier blind 9 mm ammunition is performing on par with larger caliber handgun loads, but offers substantial fiscal and training benefits. In test after test, most officers demonstrate a higher qualification score when shooting 9 mm compared to other common service calibers. Smaller statured officers and those with small hands tend to shoot better with 9 mm. Service pistols tend to be more durable in 9 mm than those in 357 Sig and .40 S&W. In a time of fiscal austerity, 9 mm ammunition is certainly less expensive. For most LE duties, there are a lot of advantages in carrying a 9 mm: easy to shoot-- especially one handed, relatively inexpensive to practice with, lots of bullets immediately on tap. When I injured my strong hand a few years ago and lost its use for several months, I found out how much more effective I was using a G19 weak handed compared to a .45 Auto 1911. I suspect in the near future many LE agencies will shift back to 9 mm given the benefits noted above.
http://soldiersystems.net/2014/09/25/fbi-9mm-justification-fbi-training-division/
FBI Training Division: FBI Academy, Quantico, VA
Executive Summary of Justification for Law Enforcement Partners
• Caliber debates have existed in law enforcement for decades
• Most of what is “common knowledge” with ammunition and its effects on the human target are rooted in myth and folklore
• Projectiles are what ultimately wound our adversaries and the projectile needs to be the basis for the discussion on what “caliber” is best
• In all the major law enforcement calibers there exist projectiles which have a high likelihood of failing LEO’s in a shooting incident and there are projectiles which have a high ting incident likelihood of succeeding for LEO’s in a shooting incident
• Handgun stopping power is simply a myth
• The single most important factor in effectively wounding a human target is to have penetration to a scientifically valid depth (FBI uses 12” – 18”)
• LEO’s miss between 70 – 80 percent of the shots fired during a shooting incident
• Contemporary projectiles (since 2007) have dramatically increased the terminal effectiveness of many premium line law enforcement projectiles (emphasis on the 9mm Luger offerings)
• 9mm Luger now offers select projectiles which are, under identical testing conditions, I outperforming most of the premium line .40 S&W and .45 Auto projectiles tested by the FBI
• 9mm Luger offers higher magazine capacities, less recoil, lower cost (both in ammunition and wear on the weapons) and higher functional reliability rates (in FBI weapons)
• The majority of FBI shooters are both FASTER in shot strings fired and more ACCURATE with shooting a 9mm Luger vs shooting a .40 S&W (similar sized weapons)
• There is little to no noticeable difference in the wound tracks between premium line law Auto enforcement projectiles from 9mm Luger through the .45 Auto
• Given contemporary bullet construction, LEO’s can field (with proper bullet selection) 9mm Lugers with all of the terminal performance potential of any other law enforcement pistol caliber with none of the disadvantages present with the “larger” calibers