I perform my own tests on my youtube channel
HERE And in all the testing I've done, the 357 has out performed the 9, 40, and 45. It has a significant advantage when using fmj.
"Outperformed" in ways that are critical to personal self defense, or in some test you made up that has little to no bearing on actual usefulness in self defense?
Your penetration tests are interesting and instructive, yet they do not scale well to defensive uses. They are a narrow sub segment of bullet performance that has limited relevance to the choice of a self defense caliber. .357 SIG fan boys will disagree, I know.
Here's a suggestion for another equally useful test that will show .357 SIG outperforms the other three callers: Shoot all four calibers straight up in the air and see which bullet goes higher.
Or, shoot all four as hollow points in the standardized FBI penetration tests with the standardized barriers to see which caliber exceeds the others consistently.
There is no need to do this since it has been done so many times. Self defense pistol cartridges today are
designed with loading and expanding bullet performance to function within the window of FBI performance standards. They all function similarly.
Medical professionals who treat bullet wounds have made it abundantly clear that pistol bullet performance in humans is unpredictable and inconsistent except for not being as lethal as tests purport to show. They state there is little difference in wound tract effectiveness between any of the major defensive pistol caliber bullets.
The .357 SIG cartridge has had numerous opportunities to prove itself more capable than other calibers for self defense, and yet it remains a niche loading. Whatever advantages it has over other defensive calibers are apparently outweighed by its disadvantages.
The real expert is the market, and
the market has spoken, no matter how few proponents of alternate calibers continue to beat their caliber wars drums.