That would be the old Hatcher Scale and the Marshall and Sanow study as regards .357 mag. .357 Sig is a great round , the case being conducive to feeding etc.etc. , however some of the claims as regards velocity etc............chunk of sodium time on many of them. Not to mention that said velocities are achieved with slugs so light that energy factors are just advertisement without all that much real world effect. Where it shines is within the niche it was designed for , to toss a 110 grain to 147ish grain slug at close to .357 mag velocities in an autoloading platform.Statistically speaking, the 357 magnum has the best reputation for 1-shot stops of any handgun. I'm guessing the stats are from back when cops carried revolvers. The 357 magnum can be loaded way beyond any 357 Sig, but a hot 357 Sig round is superior to any of the "duty" rounds out there in terms of velocity and energy. I think velocity is the real key to an incapacitating shot, because of the quick energy dump. I suspect the size of temporary wound cavity matters. The rounds I carry move at 2100 fps and are good for about 650fpe (Liberty defense makes one that is rated at 2300fps) That is approaching 10mm or AR pistol performance. It is almost twice the power of the Speer Gold dot 9mm that cops use. Even if they to use +P, hot 357 rounds are still 50% more powerful. Finally, the thing that supposedly allowed cops to go back to 9mm is the performance of the new hollowpoint bullets. From every test I've seen, the 357 Sig is 100% reliable when it comes to proper expansion. The same cannot be said for 9mm bullets when the noses get plugged with clothing.
I originally set up a tool head for my Dillon for .40 just for that reason. All my .357 Sig guns have .40 barrels except the 320.
Oh I'm not stuck with it , I buried the evil ******* 4 decades ago in a place far away , in a disassembled state with a stake through it's heart so it could never rise again.Already had a Nambu and it’s one of the few guns I haven’t regretted selling. So you’re stuck with yours.
BUT ya’ll will like the .357 Sig. Montana Gold sells boollits ya’ll can easily reload, made special for reloading practice rounds. As I’m sure you’re aware, some patience and care must be exercised with resizing a bottlenecked case, and use case lube when reloading. But then, I’ve taken to a light spray of One Shot for all my pistol reloading.
My first experience with a handgun was a .45 4” 1911. I own a P365. If you are a grown *** man and can’t shoot a micro 9 then god help you.
This was my chrono test with the 357 Sig Underwood Extreme Defender with the 65gr bullet:
Sig P224 3.5" barrel-- Vel/Energy 1st shot 2113/644, 2nd shot 2126/652 Glock 32 4.01" barrel-- Vel/Energy 1st shot 2178/685, 2nd shot 2225/714 Sig P226 4.409" barrel- Vel/Energy 1st shot 2189/692, 2nd shot 2237/722. They screamed out of my P226.