One of the main reasons why military personnel and many LEOs made the switch to 9mm handguns was because of the deeper bullet penetration. A former police officer and serviceman with the U.S. Army, Richard A. Mann is one of the most well-respected firearms authorities writing on the subject today.
The 9mm will not. As will pretty much anything under #4 buckshot.

The FBI agrees that the 9mm has lifesaving features. Unfortunately, this benefit may be completely canceled out in some states due to magazine restrictions, so it’s a good idea to review any state and local laws before buying a 9mm if you’re set on having a 15+1 capacity gun. I'm pretty sure the .50 AE can kill the soul. That means 2-3 hits per mag in 9mm vs 1-2 hits in .45 ACP. Point and shoot, only need to hit my target once...then they're down. This negates the added magazine capacity advantage of the 9mm. I agree with you completely,I like and have both -a DW Guardian in .45 and a sig p365 9mm for carry.The choice on which to carry depends upon where I am carrying and why for that day.I believe the ability to have both options covers more scenarios.Great info BTW. The FBI employs some smart people. Most people I know use hollow points as they tend to have less penetration through walls and the human body but leave aone nasty show stopping wound... What is a "safer" 9mm ammo for home protection, one with similar (or if possible less) penetration risk vs. the average .45 ammo? The results are as follows: .380 ACP (217 ft. The New York State Police, (New York Police have recently completed the transiti… I think there was a fundamental mistake about over penetration in this article. Click to share on Facebook (Opens in new window), Click to share on Twitter (Opens in new window), Click to share on Pinterest (Opens in new window), Click to email this to a friend (Opens in new window), WATCH: Testing the Ultra-Compact 5.56 Springfield SAINT Edge PDW, Primary Arms SLx MD-25: A Sub-$200 Micro Red Dot for Your AR, WATCH: The Guns & Blades From Jack Carr’s New Novel ‘Savage Son’, TOPS CUMA Kage: Exclusive Testing of the Brand-New Short Sword, Lara Spanic: The Teen Precision Shooter With Eyes on the 2024 Olympics, EXCLUSIVE: The ATF Isn’t All Bad, but Bureaucracy Has Ruined Most of It, Jack Carr Talks Books, Military Service While Shooting Long Range, VIDEO: Jack Carr Discusses His Restored 1988 FJ62 Toyota Land Cruiser.

I don’t understand why a situation in a street would be different than at home.
I do just like the author says. Wouldn't that make the.45 leap farther ahead again, in terms of "better"? More misinformation about the 9mm vs 45. The 9mm has too spotty a reputation for me to trust as my normal carry caliber. The reality is that 30% is on the high side.