You don't need anything other than an OEM .357 Sig barrel to convert .40 to .357. Do a google search for the barrels. Get the oem one. I much preferred shooting and carrying the .357 Sig over the .40 in my 229 and / or my Glock 23/32

 

When I registered my P229/40 a few years ago Sig gave me a 20% one time discount on their online store. I used it to get their 9mm conversion kit, slide, barrel, spring, guide rod and one magazine. I think it was about $275, a little more than a conversion barrel but convenient and maybe a little better shooting.

 

I’ve got a P226 in .40. Got the 357 barrel. It recoils less in 357. Not as loud as I was told (though I’m already suffering hearing loss, so that’s subjective). Accurate in both calibers. I shot a P229 in .40, and it feels similar, recoil wise. The metal framed Sigs are perfect for .40, in my opinion.

 

Congrats on your P229. I have two, a 40/357 Sig and a 9mm they are great guns. http://www.topgunsupply.com is the go to source for Sig barrels, recoil springs, magazines etc. You will like dealing with them.

 

my 229 came in .40 , i like that a lot but went for a factory 357sig barrel as i like it more for accuracy in 357 sig. both are great calibers and both work great.

 

I have a 229 Legion in 357, and it's a hell of a gun.

 

I have two P229s and have a .40 S&W barrel in one and an OEM 357 SIG barrel in the other. Yes, to change from one of those calibers to the other, all you need to do is swap barrels. The magazines and recoil springs are the same.

If you want to shoot 9 mm out of your pistol, you will either need to buy one of SIG's caliber X-change kits, which include slide, barrel, recoil spring assembly, and one magazine, or you will need to buy a "conversion barrel". Nine millimeter conversion barrels for SIG P229s are made by Bar-Sto and EFK Firedragon. I have heard that some have had success using .40 S&W/357 SIG magazines for 9 mm cartridges and some have used the same recoil spring. Others swap the recoil spring.

I would say that recoil wise, 180 grain .40 S&W and 125 grain 357 SIG are similar, but different. The latter is definitely louder and has more muzzle flash, and FMJ ammunition will be more expensive. You can review the ballistics and decide for yourself whether or not 357 SIG offers any advantage over .40 S&W for civilian self-defense purposes. In my opinion, it does not.

 

I've had them all, I prefer the 9mm in my 229's. All of my 229's and one 228 (not sure if the 228 came in anything else) are 9mm. But again, that's me. Some folks like 40 or 357 Sig...which I do out of my HK USP but they shoot differently.

 

I've had them all, I prefer the 9mm in my 229's.

Having owned only one P229, I have nothing for comparison. But my 229 "Dark Elite" in 9mm is one sweet gun. Bigger and heavier than its plastic competition, no doubt, but such a fine piece of machinery.

http://www.sigsauerguns.com/sig-p229r-9-elite-dark-nitron-adj-slite-srt.html

 

.40 no question.

 

Got a 229 in .357, LOVED IT! Went crazy and got a .40 barrel for it. LOVED IT!

Got a 9mm top, barrel, magazines and a locking insert (different from the .40/.357). LOVED IT!

Got on SIG mailing list and was offered a .22 conversion kit for $150. LOVE IT!

Another 229 in .40 walked up to me at a gun show. LOVE IT!

Only problem is the SIG Mosquito. Never would have gotten it if I'd had the conversion unit first.

I've never had to adjust the sights on any of the four slides, they're right on for my eyes and grip. .357s and .40s shoot to the same point of aim at 25-35 yards for me.

 

I've got a .357SIG barrel for my .40 P229R. It's a SIG,,, I had to.
Then again I did the same for my M&P40.:dunno:

 

Carried a Sig DA in .40 for many years as an issued duty gun. It shot well and I was happy with it, but I would have traded it for a 9mm in a heartbeat.

 

Not being familiar with .40 or .357, I didn't know if there were any advantages for feeding, accuracy, recoil, or muzzle blast issues. It looks like the .357 has a higher price point...but sometimes it's worth it.

I appreciate all of the replies and ideas. I also appreciate locations to obtain barrels and kits if I want them. This Sig will probably stay either .40 or .357. I think if I want a 9 I'll probably shop around for a Glock 19 or 43.

G

 

Feeding advantages would have to go to the 357 just because of the shape of the cartridge, but we’re talking about a P220 series gun here, so it’s gonna feed anything, anyway. I think 357 is more accurate out of my gun, but both calibers are outstanding in this department. I think the recoil is less with 125 grain Gold Dots from the 357 than 180 HSTs from the .40. Not much, but perceptible. The 357 is louder, but I’ve used it without ear protection to kill a varmint and it wasn’t painful (I consider a four inch .357 magnum revolver painful).

I like the 357 because of the ballistics. I live out in the wide open and ride ATVs across coyote-infested pasture often. We also have a bad hog problem around the river bottom. I often carry the 357 in lieu of a rifle because I’m confident in the ballistics and it gives me a little better range, at least to my mind. Now, I admit I don’t punch much paper with the 357 barrel, at least since I determined reliability and accuracy with it. The .40 barrel goes back in for target practice. In fact, I don’t believe I’ve ever put a FMJ down the 357 barrel. Decent deals can be found for 357 ammo online, but you have to hunt and wait.

 

One of my P229s is in 357SIG. (My buddy bought it as a .40 and has lost the .40 barrel over the years.) I am a fan of that round.

 

OEM 357 Sig - Final Answer
If it's good enough for the Secret Service?
It's good enough for me...

 

When I switch barrels and calibers in my P229s, I find that the 357 SIG will shoot to a little lower point of impact that the .40 S&W using the same sight picture. This really is not much of an issue unless you are shooting at longer ranges. A slight adjustment in hold is all that is required.

SIG usually puts a shorter front sight on their P22X pistols chambered in 9 mm or 357 SIG than they do on their .40 S&W P22X pistols for this reason.

On the other hand, if you are shooting at distance, the 357 SIG, being a higher velocity round, will drop less at any given range than .40 S&W does, so it does shoot "flatter" and the difference in sight picture tends to cancel out.

 

Both. I own two Sig pistols have have both barrels for both.

 

I've got a .40 P229, with an OEM .357 barrel and a bar-sto 9mm conversion barrel, (used with 9mm mags) that shoots all 3 calibers accurately and reliably.

 

I have loaded ammo for the 40sw since 1990 so for that reason alone I would go with a 40sw as I can load a 135gr bullet as lite as 1150fps to match 9mm PL or step it up in excess of 1400fps to get into the PL of a 357sig . I prefer a 155gr bullet at 1300fps and know that it works well on deer at typical defense ranges and I still have heavier options that nether a 9mm or 357sig can match or better can match . My sig is a p320c for a EDC

 

I decided on a 9.
Have my P229 in 9mm coming in tomorrow. It is a Talo ASE (Alloy Stainless Elite) model.
SRT, Sig NS, Stainless slide, alloy frame, & custom wood grips.

 

I decided on a 9.
Have my P229 in 9mm coming in tomorrow. It is a Talo ASE (Alloy Stainless Elite) model.
SRT, Sig NS, Stainless slide, alloy frame, & custom wood grips.

View attachment 381723

Congratulations, that is a nice looking gun. :thumbsup:

 

The Sig P22x models tame the recoil from .40 quite well, but I would still prefer mine in 9mm.

 

I got my P229 in 1996 (.40 S&W). Carried it for years as a duty pistol. At some point, 2010/2011...I picked up the 357 Sig barrel...

Loved shooting 357 Sig through that pistol.

Never tried the 9mm conversion.

Some very respectable agencies use(d) that round.

 

I had a 229 and 226 in .40. Both shot amazing. Should not have gotten rid of them. Now i have the 227 and 220. Both in 45. They are both sweeties as well.

 

Congratulations, that is a nice looking gun. :thumbsup:

Thanks - just received it today.


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I've looked at several P229 LEO trade in chambered in .40 S&W and suspect I'll buy one at some point. Had a S&W Model 4006 when they first came out and loved shooting it. It was my nightstand gun for many years until I was introduced to Glocks. The all metal framed guns tame the .40 nicely.