Looks like Dr. Roberts wrote the article word for word. There are a few points I will make. All of the other caliber loadings have improved over the years and not just the 9mm. I would like to see all the reasons and facts the Army has for wanting to get rid of the 9mm. It would be very interesting to see the reports from the Secret Service on why they use the .357 Sig. The FBI in the past made up the term of over penetration in order to justify dropping the 10mm and going to the .40 S&W. It is true that all the modern calibers perform equal on paper. They appear to be equal but the full power 10mm is always omitted from testing for some reason. I have a Sig P229 in 9mm and it does shoot softer than any of my other larger caliber guns even using 124 grain +P Gold Dots. Follow up shots are quicker with the 9mm making it the perfect caliber for new shooters or weaker shooters and no wonder the scores go up. But!!!, When you forget about all the gel testing and start researching real shooting accounts you find that all calibers are not equal.
The Virginia State Police has reported that attacking dogs have been stopped dead in their tracks by a single shot, whereas the former 147 grain 9 mm duty rounds would require multiple shots to incapacitate the animals. Proponents of the hydrostatic shock theory contend that the energy available in the .357 SIG is sufficient for imparting hydrostatic shock with well-designed bullets. Users have commented, "We're really impressed with the stopping power of the .357 SIG round."
In tests, the .357 SIG outperformed the 9mm, .40 S&W and the .45 ACP in higher percentage success rates in one-shot stops, fatal shots, accuracy, and less number of rounds used to stop an assailant. Loaded to the same pressure as a .357 Magnum, but 14 percent higher than a .40 S&W or a 9mm, the .357 SIG creates quite the report when fired. Recoil is similar to the .40 S&W—if you need something to compare it to—but less than the .357 Magnum. It can handle a 160-grain bullet, but 125-grain jacketed hollow points perform best for self-defense. Its stopping power is undeniable.
And now for the over penetration BS.
The .357 SIG shoots an extremely flat trajectory at longer ranges than its self-defense round counter parts. And gets even faster in longer, five or six-inch barrels. Massad Ayoob tested American Eagle’s 125-grain Full Metal Jacket bullet out to 25 yards in a 4-inch barrel Glock 32 Gen 4. He achieved highly satisfactory 1.05-inch groups. Push the .357 SIG even further, and accuracy is not compromised even out to 100 yards. Rumor has it the .357 SIG will over penetrate, but this just isn’t the case in reality. If so, the Federal Air Marshals would not be issued handguns chambered for .357 SIG. Not because a hole in the airplane would suck anyone out—it wouldn’t—but due to the confinement and closeness of people relative to the bad guy in a commercial airline cabin.
I am not trying to say the .357 Sig is the only caliber to use because the .40 also comes out better than the 9mm in real life situations.
Money talks and politicians love money. Each time the FBI has written its report on changing guns and calibers it's supposed to be the Holy Grail they are switching to. The facts are that not every gun manufacturer makes a gun that will withstand the punishment from full power .40 S&W or the .357 Sig and it causes them a lot of headaches when agencies try to use the more powerful calibers. If the gun makers can get everyone to switch to the 9mm that means more profit and less hassle. The 9mm will work but it is not used by the agencies that want what is best and not just what works.
Here is a list of State Police calibers by state to prove my point and don't forget the Secret Service caliber used.
Alabama Glock 22/23 (.40 S&W)
Alaska Glock 22/23 (.40 S&W)
Arizona Sig P226 (.40 S&W)
Arkansas Glock 21SF (State Police), Glock 22 (S.P. Highway Patrol) (.45 ACP, .40 S&W)
California S&W 4006TSW (.40 S&W)
Colorado S&W M&P (.40 S&W)
Connecticut Sig P226/P229 (.40 S&W) Switched to SIG P220 in 45ACP
Delaware Sig P229 (.357Sig)
Florida Glock 37 (.45 GAP)
Georgia Glock 37 (.45 GAP)
Hawaii (State Sheriff's Office, Honolulu) S&W M&P (9mm)
Idaho Glock 21 (.45 ACP) or Glock 22 (.40 S&W)
Illinois Glock 22 (.40 S&W)
Indiana Glock 17 (9mm)
Iowa S&W M&P (.40 S&W)
Kansas Glock 21 (.45 ACP)
Kentucky Glock 35 (.40 S&W)...........Transitioning to Gen 4 G35
Lousiana Glock 22 (.40 S&W)
Maine HK USP (.45 ACP)
Maryland Beretta Px4 (.40 S&W)
Massachusetts S&W M&P (.45 ACP)
Michigan Sig P226 (.40 S&W)
Minnesota Glock 22 (.40 S&W)
Mississippi Glock 22 (.40 S&W)
Missouri Glock 22 (.40 S&W)
Montana Sig P229 (.357Sig)
Nebraska Glock 22 (.40 S&W)
Nevada Sig P229 (.40 S&W)
New Hampshire S&W M&P (.45 ACP)
New Jersey Sig 228 (9mm)
New Mexico S&W M&P (.357 Sig).........The latest word is that NM has gone back to .40 for cost reasons
New York Glock 37 (.45 GAP)
North Carolina S&W M&P(.357Sig)
North Dakota Glock 22 (.40 S&W)
Ohio Sig P229/P226 (.40 S&W)
Oklahoma Sig P226R (.357Sig)
Oregon S&W M&P (.40 S&W)
Pennsylvania Glock 37 (.45 GAP)
Rhode Island Sig P229 (.357Sig)
South Carolina Glock 37 (.45 GAP)
South Dakota Sig P229 (.357 Sig)
Tennessee Glock 31 (.357Sig)
Texas Sig P229/P226 (.357Sig)
Utah Glock 22 (.40 S&W)
Vermont S&W M&P (.40 S&W)
Virginia Sig P229RDAK (.357Sig)
Washington S&W M&P (.40 S&W)
West Virginia S&W 4566TSW (.45 ACP)
Wisconsin Glock 22 (.40 S&W)
Wyoming S&W M&P (.40 S&W)
I have two 9mm guns that I carry on occasion rather than not carry at all. I always carry no matter what but my first choice is not the 9mm because I think I have three other much more capable calibers in 10mm, .40 S&W, and 357 Sig. all of which are loaded with the full powered loads for each as designed. I am sure you noticed I haven't mentioned the .45 and that is because it tends to bounce off some material worse than any of the other calibers. Any gun is better than no gun but I choose my caliber based on if I needed one for offense and not just get me by defense. By all means carry what you have confidence in and have a warm fuzzy feeling about. For me the 9mm is the minimum choice.