.357 sig, .357 mag

BAD visual.
It doesn't explain a single thing.

To prove my point, take a pretty picture of a .38 Special next to a .357 Sig and then go ahead and compare the performance of the two rounds.

That's the point -- the picture is a picture. It's cool, but it doesn't tell you much.

Even better example is to show a picture of a .38 Special sitting next to a 9mm and then compare those two rounds.
 
You could wildcat all sorts of magnums out of all sorts of things, and its not something new either. The problem with the larger rounds is the necessity of larger weapons to handle the size and power of those rounds. Even then, the mag capacities were usually restricted due to the size of the cases.

Most of the earlier rounds and the guns that used them were short lived and not generally well received or realistically practicable, at least not for use as personal weapons. Dirty Harry aside. :)

The 357SIG does exactly what it was designed to do, and does so in weapons that the others generally cant, those being high capacity, 9mm sized handguns that are easy to shoot, and easy to carry and conceal.
 
A round that comes close to .357 Mag. with close to 9mm mag. capacity, built on a 9mm frame, was the whole idea.
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This is true, but the idea would've been much more easily achieved by simply making a rimless variant of the .38 Super and then making a gun chambered for it with a double stack mag.

Is seems to me that the developers of the .357 SIG basically reinvented the wheel.
 
I believe the 38 Super's OAL is to long to fit in the smaller 9mm size guns.

Either way, they'd have had to re invent (more so with the 38 Super), and I believe the 357SIG is still the hotter of the two rounds, even when the 38 Super is loaded into the +P range, and thats just comparing the 357SIG in its milder, standard commercial loadings.
 
The 357 sig is a necked down version of the .40 s&w with a 9.03 mm (0.356 in) diameter bullet. It was made to give about the same results as a 125 grain 357 magnum round. None the less the 357 magnum is still more powerful than the 357 sig. None the less the 357 sig has some advantages. It has a bit more power than the .40 S&W despite the smaller bullet. It shoots flatter then the .40 S&W and because its a bottle neck cartridge it has increased reliability.

I use it, I trust it, I love it...:D
 
As currently loaded, typical ballistics include a 158grn bullet at 1200-1250fps and a 125grn bullet at 1400-1450fps with both velocities being measured from 4" revolver barrels.
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Uhm, you need to get some real .357 ammo. That's the velocity of the water-downed version. Check Double-Tap or Buffalo Bore for .357 mag loads that are loaded to their potential. They run about 200 fps hotter than the numbers you give above and recoil is not much different. You can get close to their numbers handloading (safely).

One nice thing about the 357 Sig is the increased inherent feeding reliability of the bottleneck cartridge.
 
Quote:
As currently loaded, typical ballistics include a 158grn bullet at 1200-1250fps and a 125grn bullet at 1400-1450fps with both velocities being measured from 4" revolver barrels.

Uhm, you need to get some real .357 ammo. That's the velocity of the water-downed version. Check Double-Tap or Buffalo Bore for .357 mag loads that are loaded to their potential. They run about 200 fps hotter than the numbers you give above and recoil is not much different. You can get close to their numbers handloading (safely).
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I am aware of DT's performance as was noted in my post. I quoted the numbers I did as typical ballistics as that is how the majority of companies load their ammo.
 
Great Thread!

I own a Sig P239/357sig. This happened quite by accident. I was at the range with my Sig P220 Compact and a Mosquito when someone came in with the largest quantity of Speer Gold Dots I had ever seen. They were 357sigs. I didn't give it much thought until the guy with all the ammo who was teaching a friend of his how to shoot had trouble. Namely, the poor soul was missing the target at 12ft shooting Weavered. I mean a large target. I offered him my Mosquito, which had the desired positive affect; he immediately started hitting the target. The person with the huge ammo dump insisted I try his Sig P229. It shiney from holster wear, beat up and rusty; it had been around and was definitely not a safe queen. And man, it shot like nothing I had fired since my Ruger GP100. This guy insisted that I fire 100 rounds through his Sig for helping his friend. I obliged. I was amazed at how flat it appeared to shoot. Come to find out the person with all the ammo was a U.S. Sky Marshal doing a little practicing. I began that very day making my plans to acquire a Sig chambered in 357 and looking into reloading it. I'm there now and really enjoy loading and shooting the 357sig. IMO it shoves much like a 45acp. I have let others fire it so I can observe the recoil from behind. I have fired the 40 S&W in a number of different makes and models and while I respect the round I never felt like it was a round I wanted to own/shoot. I'm not too keen on the snap of the round. Others really like it. I'm glad that we have the variety of calibers. It would be boring if everyone had the same caliber and the same firearm wouldn't it? Great read eveyrone!
 
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