SigTalk is a forum community dedicated to SIG Sauer enthusiasts. Come join the discussion about Sig Sauer pistols and rifles, optics, hunting, gunsmithing, styles, reviews, accessories, classifieds, and more!
Thanks,No a 226 slide will NOT work on a 220.
The lock up lug position on the barrels is in a different location. Not to mention there are no magazines designed to feed any kind of ammo for this kind of swap.
Thanks! A lot of good information there.Centerfired versions are different, as the barrel tilts to lock up in the slide, while rimfires do not, since they are simple blow back operation.
While the P226 9mm Barrel, can be used as a replacement, for the 9mm version of the P220, the Locking Inserts, for .45 and 9mm versions are different. So without the proper Locking Insert, the Barrel cannot function in the slide correctly.
Essentially except for rim fire Conversions, slides can only function on the sameodel frames. Even 10mm P220 slide assemblies, will only work on 10mm frames and not .45 frames, as the Locking Inserts, are different, and not interchangeable, even between different models.
Just an FYI, in Sig P226 magazines only the ones marked 40/357 will feed those correctly. The 9mm magazine is to narrow to feed the others. Others have tried to use the 40/357 mags to feed 9mm… it doesn’t work well at all.Thanks,
I didn’t think that it would work. As far as the magazines go, I have some P220 9mm mags that the 357 Sig ammo fits in. I tried that before posting the question about the slide. There are actually several manufacturers magazines that feed both 9mm/40 S&W cartridges. I didn’t think 357 Sig would be too much of a stretch…
Either way, it looks like a police trade in P226 in 40 is in my future.
I thought it was stated they fit in a 9mm magazine.Maliious Compliance, .357 Sig rounds should fit into a 10mm P220 Magazine. but doubtful an OEM 9mm P220 Magazine... while maybe possible in a Triple K 9mm Magazine...
That's why I mentioned the Triple K as possibly looder in tolerance, as well as the 10mm in case the OP was confused. Having not had one to compare, they look to be essentially .45 tubes with the narrowed guide ribs only allowing a 9mm case neck, but behind the guide ribs could be wide enough for a .357 Sig, but does the spacer at the rear of the tube allow enough length. Essentially just as the 10mm magazines are built... so if worn, the 9mm guide ribs may have allowed the .357 Sig to fit, but maybe not enough to function reliably.I thought it was stated they fit in a 9mm magazine.
The .357 Sig, definitely wouldn't slide up the breech cut while loading up from the Magazine. While it fits at the top of the stack, I wonder how it would function further down?Man, @Williard, you know how to create an
itch I need to scratch! lol
Luckily I could find one of my pre-1980 P220 9mm heel release mags. In the middle of a move, felt fortunate finding a 357 case.
It seems to fit the mag and I would expect acceptance to a 10mm, but not a 9mm, slide
View attachment 457436
If you had E2 grips for the 10mm P220, I'd suggest duct tape...I found a 50 cal can full of 357 reloads. I'll fill the mag and try cycling with a P220 in 45 and 10mm. Most likely tomorrow afternoon.
I'll need to figure out how to cycle these as I no longer have a heel release P220 (but that was 9mm anyway).
It’s actually about 0.9 different. 9mm case is 9.85mm and 10mm is 10.74mm.Whoa! I'm surprised you could fit 357 SIG rounds into a 9mm magazine! The diameter of the 357 case is 1.0mm larger than that of the 9mm case (10.0mm vs. 9.0mm). There must be some deformation in the mags to allow this. If not, I bet some deformation will occur should you try this combination while firing the weapon.
The tolerance stack of the 9mm vs. 10mm rim sizes (the critical feature for this discussion, IMHO) shows that the delta can range between 0.535mm and 1.035mm. That is, using these dims for rim diameter -It’s actually about 0.9 different. 9mm case is 9.85mm and 10mm is 10.74mm.
Sorry when you reload for decades you tend to know actual measurements because they’re important.
