Sig P220 ST Longevity?


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Para-Medic
February 24, 2012, 12:34 AM
Would a Sig P220 with an all stainless frame and slide last longer in terms of rounds fired compared to a standard 220 with an aluminum frame?


How many rounds can I expect from each's frame before it needs to be replaced? (The Aluminum and Stainless frames, respectively).

I've heard some say Sig 220 Aluminum frames only last 10k rounds. That can't be true, can it?

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sigarms228
February 24, 2012, 01:14 AM
A SIG with a stainless steel frame will last longer than a SIG with an alloy frame. Of course the downside of the stainless steel frame is the extra weight which is substantial but for a HD/range gun it may not matter to most and the felt recoil is less.

However IF you take good care of a SIG with an alloy frame meaning to keep the frame rails well lubed ideally with grease, changing the recoil spring every 3000 - 5000 rounds, and changing the breech block pins every 3000 - 5000 rounds on folded carbon steel slide SIGs you should be able to get at least 60,000 rounds out of it and some get a lot more with reports of over 100,000 rounds. Of course by 60,000 rounds you will have probably payed about $18,000 in ammo costs.

Here is the SIG maintenance schedule courtesy of sigfreund - member of sigforum who is also a SIG armorer.

believe this may still be of interest (original information from March 2008).

The following is SIG SAUER's current parts replacement schedule (numbers of rounds), with some comments of my own:

Barrel: If the pistol exhibits keyholing or unacceptable accuracy.
Decocking lever spring: 10,000
Extractor: 20,000
Extractor spring: 20,000
Firing pin: 20,000
Firing pin spring: 20,000
Magazine spring: When magazine fails to lock the slide open. *
Recoil spring: 5,000 †
Roll pins for breechblock retention (pins, HD): 5000
Safety lock spring: 20,000
Slide catch lever spring: 10,000
Takedown lever: 20,000
Trigger bar spring: 10,000

Mainspring (hammer spring): SIG SAUER evidently makes no formal recommendation about the mainspring, but lbj was told by customer service that guns with 40,000 rounds are still igniting their ammunition with the original spring. If ignition problems do develop and can't be determined to be due to other reasons, the obvious course would be to try a new mainspring.

* I also recommend replacing the magazine spring when ammunition is not held securely. This can occur before slide lock failures.

† I had seen an early recommendation here that the recoil spring be replaced after 3000 rounds, and that's what I follow.

For the armorers: SIG considers the extractor used in P220 stainless steel slides to be a "sacrificial" part, and that it should be replaced after it's removed from the slide

2zulu1
February 24, 2012, 02:18 AM
Great information, I have a P220 SAO and it's a great shooter.

Para-Medic
February 24, 2012, 01:55 PM
wow, very good post, sigarms228. Very informative!

1858
February 24, 2012, 03:16 PM
For the armorers: SIG considers the extractor used in P220 stainless steel slides to be a "sacrificial" part, and that it should be replaced after it's removed from the slide


I assume that you're referring to the internal extractor version and not the new models with external extractors.

ritepath
February 24, 2012, 03:57 PM
I was thinking about a 226 in stainless after seeing how beatup some frames get. However.com I only want the 226 (40 s&w) for a house/range gun.

sigarms228
February 24, 2012, 08:40 PM
I assume that you're referring to the internal extractor version and not the new models with external extractors

That is my understanding, for P220s in particular, that have stainless steel slides and internal extractors.

Sheepdog1968
February 24, 2012, 09:46 PM
Thanks for the maintenance schedule. I've got between 10K and 11K rounds through my alloy 220 and it looks to be in good shape. I sent it in to the factor at 5K rounds for a once over just to make sure all was good as it's my back up home defense firearm. I will likely send it in again at some point again for another once over. If I ever get to the point where it wears out, I will have a huge smile on my face.

ClemY
February 24, 2012, 11:03 PM
I was thinking about a 226 in stainless after seeing how beatup some frames get. However.com I only want the 226 (40 s&w) for a house/range gun.

I have a stainless 229 in 9mm. Recently I got a new slide and .357 SIG and .40 S&W barrels. Great fun to play with. It should last forever.

codefour
May 23, 2012, 10:39 PM
I was in the same boat as you all posted. I have a P226 in Stainless and a P220 in aluminum.

At the SHOT show this year, I went to the Sig display. I asked them which is more durable stainless or aluminum alloy. The response was shocking.

The Sig engineer (I forgot his name) said the aluminum framed guns are stronger and last longer. He said in fact they had to put put a hardened steel insert inside the stainless steel guns because it was not as strong as the aluminum frame. It is the trigger block that the barrel falls onto. He said the aluminum guns actually last longer.

He also advised you will probably never wear either frame out.

I was asking because I was in the dame boat looing to acquire another Sig. So I just picked up a P220 Elite Dark in .45 ACP, nice gun.

Fremmer
May 23, 2012, 11:21 PM
I was looking at the 226 dark in 9mm, and it looks like a beautiful gun.

Sheepdog1968
May 24, 2012, 12:14 AM
Thanks Codefour. I wouldn't have expected that either. If I ever do wear out my Sig I would be a very happy man. That would mean lots of shooting.

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