What is your take on the round? How does it perform when compared to other pistol rounds? How is the recoil from the average pistol chambered for the round? How are the terminal ballistics for the average load?
.357 Sig is a great round. Fast, flat with lots of stopping power. It is basically a .40, necked down to .38 (9mm). Also it's said to feed better than a .40, although I have never had a problem with any .40 feeding.
It's is becoming more popular with LE. One draw back is cost of ammo. I'd shoot it more often if it was less expensive. Also, because the bullet has a very shallow seating, it's has been reported that rechambering several times, can push the bullet in too far, and that might cause excess pressures.
I had an XD in 357 Sig. It was a handful recoil wise. Way more than a 9, don't know about a 40, never had one of those. I reloaded, so ammo cost barely more than loading my 9mm, once I had some brass. As far as bullet set back is concerned, I used a Lee Factory crimp die. I made up a couple of dummy shells and chambered them and rechambered them about 30 times without any set back. Factory ammo is really expensive too. I think velocity is too high to work well with lead bullets. I didn't find mine all that accurate either, compared to my Taurus PT99 9mm.
I like the 357 sig, a matter of fact, I'm almost crazy about it. I think it's the best companion to the .40 S&W if one acquires the conversion barrel. I have four platforms for the .40 S&W / 357 sig in the Sig Sauers with the P-239, P-229, P-226, and P-229 Sport Pistols. It shoots much like my Sig P-220 with hot loaded 38 supers. I buy my 357 sig cartridges through Georgia Arms Ammunition.
Don't flame be for being a Sig nut, I've always been more of a 1911 shooter.
I had a Glock 32 .357 Sig and absolutely loved the round. I have no problem dealing with the moderate recoil. I think it's about the same overall as a .40, just a little snappy, not a consistent push like a .40. To me, it's like a 9mm on steroids. I'm not sure about other guns, but with Glock you can change a .357sig to a .40 or a .40 to .357 sig with just a barrel swap. Talk about versatility.
The only problem I have with the 357sig is it being a bottled necked cartridge . I'm a reloader and especially with auto pistols like to shoot them a lot. With a bottled necked cartridge you can't use a carbide die which means that you have to lube all your cartridges before you can size them. Not a big deal if you have the time. I think a 40 can do anything a 357sig can do and if I feel I really need 357mag ballistics why that it what i'll use. Didn't NAA have a small pistol that used a 25 bullet in a 32 necked down case or was it a 32 bullet in a 380 case. I don't remember which. The 357 sig is a fine round but enters a crowded field. CD