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  #1  
Old 02-06-2020, 01:23 PM
leo5517 leo5517 is offline
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.357 Sig 1911

Anyone have knowledge of a 1911 in .357 Sig caliber? I have a few other than 1911 pistols in this caliber and reload for them. A 1911 in this caliber might be a good edc.
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  #2  
Old 02-06-2020, 03:22 PM
KeysMIA KeysMIA is offline
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I haven't seen a production 1911 in .357 Sig but I have seen .357 Sig barrels in .40S&W 1911's. Colt used to offer a Defender model chambered in .40 S&W. A simple barrel swap and your in business since the .357 uses the .40's slide, mags, extractors, etc.

Should be a impressive to shoot, especially in a Defender sized 1911!
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  #3  
Old 02-06-2020, 04:23 PM
fnfalman fnfalman is offline
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Quote:
Originally Posted by leo5517 View Post
Anyone have knowledge of a 1911 in .357 Sig caliber? I have a few other than 1911 pistols in this caliber and reload for them. A 1911 in this caliber might be a good edc.
As far as I can tell, SIG Sauer USA made and still makes a few .357 SIG M1911. There might be custom jobs out there, but SIG Sauer is the only production shop that I know of that did and still put out 1911 in this weird caliber.
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  #4  
Old 02-06-2020, 07:26 PM
Deyomatic Deyomatic is offline
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Why are all of these conversions from .40S&W to .357 Sig, and vice versa? Seems just as easy to make a thick walled barrel that'll fit in a .45ACP. Magazine issues, maybe?
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  #5  
Old 02-06-2020, 07:54 PM
Striker2237 Striker2237 is offline
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Quote:
Originally Posted by Deyomatic View Post
Why are all of these conversions from .40S&W to .357 Sig, and vice versa? Seems just as easy to make a thick walled barrel that'll fit in a .45ACP. Magazine issues, maybe?
Breechface alignment issue
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  #6  
Old 02-06-2020, 08:03 PM
Boge Boge is offline
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Originally Posted by Striker2237 View Post
Breechface alignment issue
Huh? The .40 S&W/.357 SIG share the same parent case head.
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  #7  
Old 02-06-2020, 09:01 PM
DubfromGa DubfromGa is offline
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The only one that I'm aware of is this Sig:

https://www.sigsauer.com/store/1911-...are-carry.html


Their listing is odd....shows the same gun in .45acp weighing 3.8 ounces more than the .357Sig version does.

I would think it'd be the other way around due to the thicker barrel wall of the .357Sig version.
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  #8  
Old 02-07-2020, 07:04 AM
Hopknockious Hopknockious is offline
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Originally Posted by Boge View Post
Huh? The .40 S&W/.357 SIG share the same parent case head.
Striker was referencing the comment about a thick walled barrel for 40/357 to fit in a standard 45 slide.
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  #9  
Old 02-07-2020, 08:19 AM
SoDak SoDak is offline
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Quote:
Originally Posted by Boge View Post
Huh? The .40 S&W/.357 SIG share the same parent case head.
The Sig is a necked down 40. Some try to use 40 cases but they are just a bit too short to give you the factory 357 case length, but some do it anyway.
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  #10  
Old 02-07-2020, 08:29 AM
gunnut606 gunnut606 is offline
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  #11  
Old 02-07-2020, 10:46 AM
leo5517 leo5517 is offline
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Thanks Dub ,
That looks like a nice 1911 I will do some research it has some good reviews.
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  #12  
Old 02-07-2020, 11:57 AM
glider glider is offline
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Looking at ballistics a 357 sig, 38 super, and 9x23 are very close. The 357 sig might edge the others out a little but not by much. Probably the cheapest way to get that performance would be to machine a 9mm barrel to accept the 9x23.
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  #13  
Old 02-07-2020, 01:29 PM
hub1home hub1home is offline
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Quote:
Originally Posted by leo5517 View Post
Anyone have knowledge of a 1911 in .357 Sig caliber? I have a few other than 1911 pistols in this caliber and reload for them. A 1911 in this caliber might be a good edc.
This isn't a 1911 but it's the closest thing I've come to one in .357. About 20 t0 25 years ago, I heard that a Sig 229 could be bought in either Sig 357 or S&W .40 and all you had to do was to swap the barrels to change and have both calibers in the same gun.

I did this and it worked perfectly with nary a problem. However, with my poor memory, its seems that the magazines also had to be changed but I am not sure. It seems that I bought everything from Sig. About seven years ago, I got into a money crunch and sold it along with many others. I do miss all of them.
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  #14  
Old 02-07-2020, 01:45 PM
snakebill snakebill is offline
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Any 1911 you like in 10mm or 40sw can have a 357 sig barrel fit and can use the same magazines. Someone with more knowledge may correct me if I’m wrong, but the extractor and ejector should be good to go as well. Fusion makes barrels in almost every caliber. This might be a great excuse to do a little customizing.
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  #15  
Old 02-07-2020, 01:52 PM
Tomcatt Tomcatt is offline
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I have a Sig TacOps in 357Sig. It is one of the most accurate 1911s that I have. It has been 100% since day one. I like it.
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  #16  
Old 02-07-2020, 03:02 PM
markm markm is offline
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Quote:
Originally Posted by hub1home View Post
This isn't a 1911 but it's the closest thing I've come to one in .357. About 20 t0 25 years ago, I heard that a Sig 229 could be bought in either Sig 357 or S&W .40 and all you had to do was to swap the barrels to change and have both calibers in the same gun.

I did this and it worked perfectly with nary a problem. However, with my poor memory, its seems that the magazines also had to be changed but I am not sure. It seems that I bought everything from Sig. About seven years ago, I got into a money crunch and sold it along with many others. I do miss all of them.
Yes the 229/229s use the same magazine for 40/357Sig and only need a barrel. 239 uses a different mag but I don't know why.

I wanted to convert a couple of my 1911s to 357 Sig but the people I buy barrels from said they stopped selling them for reliability issues I believe. I don't know, Sig seems to have them working but to be hones I've never really tried one. Doesn't break my heart though because to me it's just a novelty as I have a couple barrels for my Sigs in that caliber and it's kind of fun.
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  #17  
Old 02-07-2020, 03:07 PM
tractor tractor is offline
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Sig 1911 Nigthmare Fastback are available in 357 Sig. I have one and they are a great pistol.
There are some on GB, new and used.
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  #18  
Old 02-07-2020, 04:22 PM
GT40DOC GT40DOC is offline
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Quote:
Originally Posted by KeysMIA View Post
Colt used to offer a Defender model chambered in .40 S&W. A simple barrel swap and your in business since the .357 uses the .40's slide, mags, extractors, etc.

Should be a impressive to shoot, especially in a Defender sized 1911!


I did this swap many years ago, and still own the Defender. It is impressive at the range, especially if one handloads with Blue Dot powder!!!
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  #19  
Old 02-09-2020, 06:15 AM
377thPFAB 377thPFAB is offline
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Have always been a fan of the 357 Sig round. Have carried it the Sig 229 platform for at least 5 years. Then I discovered the world of 1911s. The Sig Fastback Carry is a well balanced pistol and shoots like a champ.
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  #20  
Old 02-09-2020, 08:42 AM
studenygreg studenygreg is offline
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I think if I do ever get into the 1911 .357sig game , I would rather just purchase one in that caliber. I'm not much of a caliber swapping person.

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