Sig P239
can the mag release on a sig p239 be switched to the other side and can you tell me how thanks
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Are the magazines interchangeable between calibers?? (.357 Sig, 9 MM,
40 S&W). I put 9 MM in a .40 magazine and they stayed put. The .357 is necked down 9 so most of the case is the same size 9 MM.
I stand corrected on the .357 Sig. I knew it and spaced it.
Thanks one and all. Will not try to use anything but what is intended for each caliber.0 -
.357 Sig is a necked down .40 S&W. 0 -
Not sure about the Sig but I do know that in a KelTec P11 (9mm) a conversion slide and barrel is/was available to change to .40 S&W and/or .357 Sig. Some, not all, of the P11 9mm mags will run the .40 S&W and/or the .357 Sig without a problem, others have feeding issues. KelTec made a P40 in 40 S&W with a specific magazine for it (which also fits the P11) and this mag seems to run all three calibers reliably.
I have noticed a slight variation in the feed lip angle between the dedicated P11 9mm magazine and the P40 40 S&W magazine which seems to be necessary for the .40 caliber but which doesn't seem to affect the 9mm feeding.
That being said, the profile and angle of the feed ramp on the Sig may be such that the influence of the magazine feed lips is accentuated. If you have the mags available, I would give it a try at the range. I probably wouldn't purchase .40 S&W mags hoping that they would work reliably sight unseen in the 9mm platform. Or vice versa.
Dan R0 -
mrs102,
The geometry of the 9mm based Vs. the 40S&W based magazines has to be different, for proper feeding. I know, that a lot of the 9mm extraction systems will work with the 40 S&W sized cases.
That said, I would think that 9mm would be the lone man out, while 357 Sig, and 40 S&W could be fed from the same magazine.
Best0 -
The 357 SIG cartridge isn't exactly the same as just a 40SW necked down to 9mm (if you were to "unstretch" a 357 SIG, its a little longer), but rim design, overall length of the LOADED cartridge, and case diameters are similar by DESIGN, so that 357 can be run in 40SW guns.
So in general and again by design, the only thing you need to do to convert between 357 SIG and 40SW is swap the barrel.
Along those lines, with most (but not all) guns the magazines for .40SW and 357 SIG are identical. With a few guns, the 357 SIG mag lips are a little different to better accommodate the round bottleneck shape. EG, my understanding is that this is true of Glocks. But in most, if not all cases, you can run 357 SIG through 40SW magazines with no issues.
And you didn't ask, but IMO 357 is a little overrated. On its own merits, the ballistic performance of the round is excellent, falling just shy of true .357 magnum ballistics with similar weight bullets. In theory the bottleneck round shape "should" make the cartridge more reliable in loading and extraction compared to the same gun running straight wall cartridges, though I think in practice the same exact guns in .40SW and 9mm luger tend to be highly reliable. Also the bottleneck shape of the cartridge makes reloading for it a bit trickier than ordinary straight wall pistol cartridges (though nothing an experienced reloader can't handle).
The "problem" is, if the main point of this round is the ballistics, you can get pretty darn close to them with ordinary .40SW rounds with light 135 grain bullets, or even a good 9mm+P (let alone something like .38 super or 9x23 winchester).
If you compare, this is what you get:
.357 magnum, 125 grain bullet: 1450fps.
357 SIG, 124 grain bullet: 1350 fps
.40SW, 135 grain bullet: 1325 fps,
9mm luger +P, 124 grain bullet: 1250 fps.
9mm luger +P, 115 grain bullet: 1350 fps.
On top of that, 9mm ammo is more readily available 357SIG, generally cheaper (especially non +P "practice" ammo), and the guns themselves are higher capacity. Is the extra 100 fps from 357 SIG really "worth it" over 9mm+P? For most shooters, I don't think so.0 -
quote:Originally posted by mrs102
Are the magazines interchangeable between calibers?? (.357 Sig, 9 MM,
40 S&W). I put 9 MM in a .40 magazine and they stayed put. The .357 is necked down 9 so most of the case is the same size 9 MM.
I stand corrected on the .357 Sig. I knew it and spaced it.
The .40 mags will usually work with .357, but 100% feeding is not a guarantee. However the .357 mags will not work with .40. The .357 mags are thinner at the front. I asked Sig once about it, they said that during their factory testing they could not get 100% reliability with the same mags using both .40 and .357, so they had to make dedicated mags. I have tried it with my .40 P239 using the .40 mags with a factory .357 barrel. It is not reliable enough for CCW, so I bought .357 mags which makes it reliable. And the 9mm has it's own mags.0 -
M1a has it right. The 239 is the only Sig that will not perform reliably in .40 and .357 with the same magazine. Sig is very specific about this in their literature and when talking to their customer service people. The 9 mags have alignment ribs pressed into their sides and will not function well, if at all, with the fatter rounds based on the .40 case. 0 -
For what it's worth, I know what the ballistics say but 357 sig is the way to go for me. Having shot all of these the 357 sig will flat out destroy some steel targets that the 40 and 9 won't. And I have read that it performed very closely to the 357 mag in FBI tests even out performing it in some. 0 -
.357 Sig is a way better performer than a .40 S&W or 9mm.. I have a 239 in .357 Sig and its one of my favorite pistols. 0 -
quote:Originally posted by toolmaniam
.357 Sig is a way better performer than a .40 S&W or 9mm. I have a 239 in .357 Sig and its one of my favorite pistols.
Here are Corbon numbers, I doubt if there would be much terminal difference between any of them.
9mm Luger Plus P
Bullet Wt.: 125gr CORBON Self-Defense JHP
Velocity: 1250fps
Energy: 434ftlbs
Test Barrel Length: 4.0 Inches
Caliber: 40 S&W
Bullet Wt.: 135gr CORBON Self-Defense JHP
Velocity: 1325fps
Energy: 526ftlbs
Test Barrel Length: 4.0 Inches
Caliber: 357 Sig
Bullet Wt.: 125gr CORBON Self-Defense JHP
Velocity: 1425fps
Energy: 564ftlbs
Test Barrel Length: 4.0 Inches
And just for fun, let's throw this one in:
Caliber: 38 Super Auto Plus P
Bullet Wt.: 125gr CORBON Self-Defense JHP
Velocity: 1325fps
Energy: 487ftlbs
Test Barrel Length: 5.0 Inches0
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