357 Sig

[J. R. WEEMS]

357 SIG

I don't own any handguns chambered in .357 SIG or .40 S&W, and don't plan to buy one. But if I did, I would get the other caliber barrel, assuming one is available. I like having a pistol with the ability to easily switch calibers should the need arise.

My SIG 250C came with BOTH barrels. I need to find some smaller decapping pins for my RCBS universal decapping die. The Sig brass has smaller primer holes for some reason. Have plenty of brass for both but the SIG doesnt see much use because of the smaller holes. I have Dillion carbide for it, just in case.

 

[27 Man]

My only pistol in .40 S&W is a Sig P226. I bought a barrel in .357 Sig off an individual on this site. Used it once. Need to get it out and burn some powder.

 

[BAM-BAM]

I don't own any handguns chambered in .357 SIG or .40 S&W, and don't plan to buy one. But if I did, I would get the other caliber barrel, assuming one is available. I like having a pistol with the ability to easily switch calibers should the need arise.

By the time the .357 sig and .40 came along in the early mid-90s I was heavily into 9mm and .45s as my auto rounds ..... didn't see either being a great improvement or at least not worth the $$$$s to make a switch over of guns mags and leather.... so I let those ships sail without me............

About a decade ago I came across an "as new in box" Sig 229 with night sights and two barrels in .357sig and .40S&W with IIRC 3 maybe 4 mags for $500 out the door.

I'd owned at least one 226 in the past and still had Sig 220s and 245 .... and I never trade leather away ......... so
What the h---!

Added a couple more mags and a 100-150 rounds each of .357 and .40; and packed the whole lot away as my only "guns" in .357sig and .40S&W.....a few years go by, and a month or so after Sandyhook I'm in our local Dunham's........ shelves are bare except for 12 or 15 boxes of .357 Sig at about $25/50 rounds........ for the next 8 or 9 weeks I'd stop in and buy a box.

A few years later .40 seemed to bottom out and I picked up a few more boxes one at a time .........

Today I'd have a self contained stash of gun,mags ammo and leather.......but....... it was all sadly lost in a boating accident in 2016!

 

[ggibson511960]

A quick perusal of the SAAMI chamber and cartridge diagrams indicates that simply running a .357 SIG chamber reamer into a 9 mm Parabellum barrel would convert it. The feed ramp, extractor groove and extractor would likely need work, but it looks feasible if desperation set in and no barrels were available. Magazines would be another issue, but .40 S&W mags supposedly work for .357 SIG.

 

[MrMoose]

I am a .357 Sig fan. I sometimes run KKM barrels in G23 & G27. Reliable operation, high precision and amazing accuracy.

Picked up a CPO P229 in .357 with a .40 barrel for a great price.
Had some Grayguns goodness and Siglite sights installed

The way I look at it, if 9mm is good at 1,000fps, it must be even better north of 1,300fps? The trade-off is magazine capacity but, .357 has flat-shooting, hard-hitting attributes.

 

[J. R. WEEMS]

MAGS

A quick perusal of the SAAMI chamber and cartridge diagrams indicates that simply running a .357 SIG chamber reamer into a 9 mm Parabellum barrel would convert it. The feed ramp, extractor groove and extractor would likely need work, but it looks feasible if desperation set in and no barrels were available. Magazines would be another issue, but .40 S&W mags supposedly work for .357 SIG.

Well they do in my Sig 250C came with 3 mags and they all work either way. First thing I did when I got it was locate 7 more mags.

 

[hammy5150]

I have a .40 P229 that I picked up a .357 barrel for. Really fun little round to shoot, shame that it's been completely bulldozed by the 9mm meta but even with it falling out of favor as a service caliber I don't see it vanishing completely.