P365/365XL Question (Again)

[TomJ]

In a previous thread I had questions regarding recoil springs and light primer strikes. With the upgraded recoil spring in my XL that issue seems to be resolved. I just returned from my gun club where I put about 600 rounds through my two P365's and my P365XL. All 3 fed and fired every round. I do have two additional questions. With the installtion of the new, stiffer recoil spring approximately 20% of the time the slide on my XL now slams shut when I insert a magazine without me releasing the slide. I did not have this issue with either P365, my Glock 26 or HK VP9SK. Is this a sign of another problem with the gun that should be addressed by Sig, or does it pose some type of risk? It otherwise functioned well. The slide on one of my P365's fails to lock back about 10% of the time. Again, I did not have this issue with any other gun, and it's not me having my thumb on the slide release. Is this something I should have Sig repair or do I live with it since the gun otherwise functions well? My gut is telling me to have Sig correct both problems, as the guns should function correctly and if I decide to sell one or both of them, which I may do, I will not knwoingly sell a gun that isn't 100%.

 

[<*(((><]

So you’re saying that now when you insert a magazine on a locked back the slide automatically closes chambering a round?

 

[TomJ]

So you’re saying that now when you insert a magazine on a locked back the slide automatically closes chambering a round?

Yes. It didn’t do it with the old recoil spring. I’m not slamming the magazine in, as I know that can cause that issue. I’m sounding like a drama queen with these P365’s and their issues. Barring the unforeseen I’m going to get them working correctly and sell them.

 

[<*(((><]

Yes. It didn’t do it with the old recoil spring. I’m not slamming the magazine in, as I know that can cause that issue. I’m sounding like a drama queen with these P365’s and their issues. Barring the unforeseen I’m going to get them working correctly and sell them.

I don’t think you sound like a drama queen, a firearm you are depending your life on should be operating in normal parameters.

Some pistols are designed to do just that, I’m not sure if that’s the case with the Sig P365 series pistols. There are some that like that feature and some that don’t. It could also be an indicator of a worn slide stop.

What I’m guessing the situation is, is that the slide stop was designed to work reliably when inserting a full mag and remaining open with a recoil spring of stock spring force. With the extra power recoil spring it sounds like the design of the slide stop isn’t sufficient to hold against the jarring of magazine insertion with the new force being exerted It.

I would wonder about how the slide stop is going to hold up with the extra force the pistol wasn’t designed around, it’s probably not a concern to be worried about. But with what you’ve now witnessed it seems you are seeing the ramifications of changing design on the fly.

If you choose to keep them and they reliably close the slide on magazine insertion it is something you can train around. You would want to pay extra attention where your muzzle is pointing when magazines are being inserted if there is a situation where the firing pin is stuck protruded and fires a round on loading.

 

[TomJ]

You would want to pay extra attention where your muzzle is pointing when magazines are being inserted if there is a situation where the firing pin is stuck protruded and fires a round on loading.

I appreciate the info. This is my concern. I don’t mind it closing on it’s own, but I can’t risk an AD. I’m sending it back to Sig Monday.

 

[Jeb Stuart]

Might want to listen to your gut feeling. It seems forces are telling you that the Sig is not the gun for you. Just something to think about.

 

[TomJ]

Might want to listen to your gut feeling. It seems forces are telling you that the Sig is not the gun for you. Just something to think about.

Once it comes back from Sig and I'm comfortable that it's working I'm putting it up for sale. I've had enough. I bought a Hellcat and will pick it up after Monday. I'll have a chance to shoot it by next weekend, at the latest. In the meantime my Glock 26 is working out well.

 

[Old Dog]

With the installtion of the new, stiffer recoil spring approximately 20% of the time the slide on my XL now slams shut when I insert a magazine without me releasing the slide.

This is not exactly an uncommon phenomenon with many auto-pistols, and it's not necessarily a problem. Usually, once the recoil spring wears in, it resolves itself. But again, it's not necessarily a problem unless you believe it to be so.

The slide on one of my P365's fails to lock back about 10% of the time.

Does it do this with every magazine? You've got to eliminate a problem magazine as the cause. Have you had someone do a little video of you shooting to make sure your thumb isn't hitting the slide-stop? With the enhanced style grips on some SIG pistols, I had the same problem, and was just totally sure I wasn't the cause ... until I had another instructor video record my shooting from the left side; sure enough, it was all my meaty thumb riding up while I was shooting.

 

[LaneP]

I agree, it should go back as it should not drop the slide simply on inserting a mag. Sounds like the release cutout on the slide is either worn, the catch is worn, or a little of both. Sorry to hear you're having these issues. I have a P365 and it's been good through several hundred rounds so far but who knows what tomorrow may bring.

 

[TomJ]

This is not exactly an uncommon phenomenon with many auto-pistols, and it's not necessarily a problem. Usually, once the recoil spring wears in, it resolves itself. But again, it's not necessarily a problem unless you believe it to be so.
Does it do this with every magazine? You've got to eliminate a problem magazine as the cause. Have you had someone do a little video of you shooting to make sure your thumb isn't hitting the slide-stop? With the enhanced style grips on some SIG pistols, I had the same problem, and was just totally sure I wasn't the cause ... until I had another instructor video record my shooting from the left side; sure enough, it was all my meaty thumb riding up while I was shooting.

I did track what magazines all issues were happening with, and it's not specific to any magazines. In regards to my thumb hitting the slide stop, I was aware that it may be an issue and made sure it wasn't doing so. I fired about 400 rounds through the other P365 and XL without that issue occurring, so I'm sure it's the gun.

 

[JR24]

Once it comes back from Sig and I'm comfortable that it's working I'm putting it up for sale. I've had enough. I bought a Hellcat and will pick it up after Monday. I'll have a chance to shoot it by next weekend, at the latest. In the meantime my Glock 26 is working out well.

Ha, I was about to say "sounds like you need a Hellcat".

Sorry that you have such issues with your 365, the one I had was (and is, according to it's new owner) flawless with the exception of being too small for my hands.

But, at the end of the day you gotta trust a carry gun and even after being "fixed" if you don't feel comfortable it's time to move on.

 

[WYO]

This is not exactly an uncommon phenomenon with many auto-pistols, and it's not necessarily a problem.

I understand that it is rather common with some versions of the S&W M&P line. One person I know views it as a positive feature rather than a bug.

 

[TomJ]

I was back at my gun club today and shot it some more. Evern if I could live with the slide slamming shut, I had more light primer strikes and the slide was not locking back from time to time upon shooting the last round in the magazine. Something is obviously not right with this gun.

 

[WYO]

When you don't trust a gun, the decision is simple. Get rid of it with full disclosure.

 

[TomJ]

When you don't trust a gun, the decision is simple. Get rid of it with full disclosure.

That’s what I’m doing once it’s back from Sig.

 

[TomJ]

Duplicate

 

[Old Dog]

Interesting. I have just about decided that the SIG P-365 XL is about the most perfect carry pistol ever.

 

[TomJ]

Interesting. I have just about decided that the SIG P-365 XL is about the most perfect carry pistol ever.

I agree, if mine functioned correctly.

 

[drobs]

The slide closing and chambering a round when the magazine is inserted briskly is pretty normal happenstance with Glocks and H&K's. IIRC my H&K USP 45 mentioned it in the manual. Stating it was normal.

I can live with a slide not locking back on the last round as long as the gun is reliable otherwise.

 

[TomJ]

The slide closing and chambering a round when the magazine is inserted briskly is pretty normal happenstance with Glocks and H&K's. IIRC my H&K USP 45 mentioned it in the manual. Stating it was normal.

I can live with a slide not locking back on the last round as long as the gun is reliable otherwise.

That still leaves the issue of the light primer strikes, which obviously does need to be fixed.

 

[drobs]

That still leaves the issue of the light primer strikes, which obviously does need to be fixed.

What brand / type of ammo?
600rds through 2 P365's in one sitting has got to be tiring.

I find my sub compacts - Ruger LC9s, Sig P365, Ruger LCP need a firmer grip - more so than my Glocks (2 each 19's & 1 each 26). Could it be your grip is getting loose midway through that round count?

 

[TomJ]

What brand / type of ammo?
600rds through 2 P365's in one sitting has got to be tiring.

I find my sub compacts - Ruger LC9s, Sig P365, Ruger LCP need a firmer grip - more so than my Glocks (2 each 19's & 1 each 26). Could it be your grip is getting loose midway through that round count?

I shot the 600 rounds Saturday. I shot about 150 rounds yesterday and experienced the three problems I mentioned. It’s occurred with HST, PMC, Tullammo and yesterday with 147 grain Winchester Ranger ammo. I wish it was ammo related, as that would be an easy fix.

 

[spar10]

I share some of what you're experiencing. My 365 was having light strikes, something I've never experienced with any other handgun in my collection. I was able to eliminate the ammo as the cause and that immediately confirmed it was the gun. I'm going to exchange it for a new one and chalk this up to bad luck.

At the end of the day, you're the one that has to be completely confident that if you ever need to pull the trigger it's going to be immediately followed by a bang. At this point in time, I'm going back to carrying my G27 until I get a new P365 and verify the problem has been solved. There's no margin of error here and I will not accept anything less than complete confidence in the firearm I choose to carry. I love all of my Sigs and feel confident this situation will be cured with a new gun.