SIGforum
Sig P239 40/357 Sig question
March 18, 2020, 04:23 PM
mbliss57Sig P239 40/357 Sig question
I have both barrels. I have a bunch of .40 cal mags and a couple of 357 Sig mags. I know the 40 cal won't work in the 357 sig mags but has anyone tried using 357 Sig rounds in .40 cal mags?
West German Sig P220, P6, P226, BDA
March 18, 2020, 04:47 PM
sns3guppyThey work fine.
You can actually throw a 9mm barrel in there and shoot 9mm out of the .40 magazine, too. It will feed and function. best to have the right magazine, but it works. It works out of a P226, too, extraction and all.
March 18, 2020, 04:50 PM
tleo205Yep...no problem at all using the .357 rounds in the .40 mags.
March 18, 2020, 05:38 PM
sigfreundquote:
Originally posted by tleo205:
Yep...no problem at all using the .357 rounds in the .40 mags.
I have read that many times here.
► 6.4/93.6
“Wise men talk because they have something to say; fools, because they have to say something.”
— Plato March 18, 2020, 06:37 PM
Phelen_KellI had mostly 40 mags for my 357 P239. The 357mags had the front side squeezed so .40 rounds wouldn't fit.
March 19, 2020, 12:43 PM
pulicordsFWIW: I've got barrels and spring kits for my P239 in .357 Sig, .40 S&W, and 9mm. My 9mm barrels work fine using ammunition in that caliber with either of the other calibers. YMMV!
"I'm not fluent in the language of violence, but I know enough to get around in places where it's spoken."
March 19, 2020, 09:04 PM
mbliss57quote:
Originally posted by pulicords:
FWIW: I've got barrels and spring kits for my P239 in .357 Sig, .40 S&W, and 9mm. My 9mm barrels work fine using ammunition in that caliber with either of the other calibers. YMMV!
Just so I understand..I have 2 different P239 SAS
pistols. One is 9mm the other 40/357 Sig with the 2 barrels. If I just that the 9mm barrel, spring and mags out of the 9mm I can use them in the 40/357 Sig pistol? I am intrigued because if this is possible I can sell th 9mm pistol and just buy the 9mm barrel, spring kit and mags. I am used to 3rd gen s&Ws where caliber interchangeability is a foreign concept.
West German Sig P220, P6, P226, BDA
March 19, 2020, 09:46 PM
hrcjonOf course not officially sanctioned, but most report that works just fine.
“So in war, the way is to avoid what is strong, and strike at what is weak.”
March 20, 2020, 06:23 AM
Blume9mmYep, I did the same thing... inserted a 9mm barrel in my Sig p239 40/357 using the original recoil spring/rod and magazine and the dern pistol functioned just fine....
I've been warned here not to do the opposite... the 40/357 slide is heavier than the 9mm slide and so shooting a heavier load with the 9mm Slide could (would?) put too much strain on it.
My Native American Name:
"Runs with Scissors"
March 20, 2020, 06:26 AM
Blume9mmquote:
Originally posted by Blume9mm:
Yep, I did the same thing... inserted a 9mm barrel in my Sig p239 40/357 using the original recoil spring/rod and magazine and the dern pistol functioned just fine....
I've been warned here not to do the opposite... the 40/357 slide is heavier than the 9mm slide and so shooting a heavier load with the 9mm Slide could (would?) put too much strain on it.
Note: what I'm saying is all you need is a 9mm barrel only... you don't need anything else to shoot 9mm in the p239 40/357 pistol. The problem I've run into is it looks like the only barrels available out thee are ones extended with a thread on then end.... Personally I suggest just keeping the 9mm p239.... I am looking for one in SA/DA to add to my stock...
My Native American Name:
"Runs with Scissors"
March 20, 2020, 07:18 AM
mbliss57Thanks for the help. If our local range reopens today (rumoured) I will take both and try this out.
I think it's wise if I keep both guns for spare parts/ backup if nothing else. Plus buying another barrel is not free.
West German Sig P220, P6, P226, BDA
March 20, 2020, 05:20 PM
pulicordsquote:
Originally posted by mbliss57:
Just so I understand..I have 2 different P239 SAS pistols. One is 9mm the other 40/357 Sig with the 2 barrels. If I just that the 9mm barrel, spring and mags out of the 9mm I can use them in the 40/357 Sig pistol? I am intrigued because if this is possible I can sell th 9mm pistol and just buy the 9mm barrel, spring kit and mags. I am used to 3rd gen s&Ws where caliber interchangeability is a foreign concept.
You can convert a .40 S&W or .357 Sig P239 to 9mm with a barrel and recoil spring change, but not a 9mm pistol (to .40 S&W/.357 Sig). As a 9mm, my P239 shoots just as reliably as it does in the other two calibers (it was originally a .357 Sig) and is in it's most accurate form!
"I'm not fluent in the language of violence, but I know enough to get around in places where it's spoken."
March 20, 2020, 06:01 PM
RichardCquote:
Originally posted by pulicords:
You can convert a (dot dot dot) .357 Sig P239 to 9mm with a barrel and recoil spring change
But why? All of the
JOY would be X'd out. Obliterated. Cancelled. Negated. Zeroed. Bean-countered. Eliminated. Lost. FUBAR'd.
Why?
____________________
March 20, 2020, 06:08 PM
pulicordsquote:
Originally posted by RichardC:
quote:
Originally posted by pulicords:
You can convert a (dot dot dot) .357 Sig P239 to 9mm with a barrel and recoil spring change
But why? All of the
JOY would be X'd out. Obliterated. Cancelled. Negated. Zeroed. Bean-countered. Eliminated. Lost. FUBAR'd.
Why?
Because it's there!
"I'm not fluent in the language of violence, but I know enough to get around in places where it's spoken."