P365 - issues resolved?

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Alllen Bundy said:
I've been doing some spring testing on the stock Sig 12 rd springs and also the MagGuts 12+ 2 spring kits. I noted that out of 8 stock Sig 12 rd springs, one of the springs had substantially lower spring force than the others. It may be that you got a weak batch of springs.

I tried doing some accelerated life testing by making a bullet shaped plunger and mashing the Sig and the MagGuts springs down 500 times to simulate 500 loadings of the magazines. Both springs lost spring force but did not cause any problems at the range. Since that test I've kept both of those magazines loaded for over 7 months and the spring force has reduced further. I'll be testing these springs at the range in about a week and reporting my results.

My suspicion is that the Sig Springs are reliable enough, however the quality control is lacking and that some of their springs do not initially have enough spring force to last over the lifespan of the magazine.

The ISMI springs that NDZ sells are heat treated and stress relieved AFTER forming, which makes a superior spring that more resistant to stress fatigue failure and should be longer lasting than the Sig springs. I bought 4 - 12rd ISMI magazine springs but I haven't tested them yet.

One of the things I am trying to determine is what minimum spring force is required for reliable operation so that I can periodically measure the spring force and replace any weak springs before they cause a failure to feed or lock back the slide. You really don't want any more spring force than required, as it just causes the cartridges to have more friction against the stripper rail on the slide making it more difficult to retract the slide.
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Hard to beat those ISMI springs. Used them in 1911 before getting them for Glocks. My go to for magazine spring and recoil spring replacements.
 
I don't know what you people are talking about. It's well established that the P365 is a completely unreliable POS, and you'd be better off carrying a broken beer bottle.

Kidding of course. Sorry, I feel like causing trouble today.

The P365 is shaping up to be a super carry option. I chose the Hellcat only because it fit my hand a little better. If the Hellcat didn't exist, the 365 is what I would have bought.

I mean my P938 Legion is still my preference, but just cuz tiny.
 
Love my Sig P365! It’s mainly my EDC, occasionally carry my DW CCO 1911. The Sig only had a dead front sight, Sig took care of it asap. The 365 is carried in a Tulster IWB kydex, light, thin, disappears, very easy to carry. Pistol is accurate, reliable, a fine defensive choice. Great design.
 
460Shooter said:
I chose the Hellcat only because it fit my hand a little better.....
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And to my mind that is a good reason for choosing. I originally bought the P365 Tac Pack which came with 3 -12rd magazines. I've got XL hands and I just could NOT see myself shooting with the shorter 10 rd magazines. But a year and a half after I bought my P365 I thought that there are some situations where I might want to pocket carry. I decided to give the shorter 10 rd magazines another chance and I bought one flush fit 10 rd mag and one 10 rd mag with the pinky extension. They arrived yesterday.

They both feel HORRIBLE in my hand. Because of the sharp edges on the magazine floorplates they uncomfortably dig into my hand and little finger when I tightly grip the pistol. To make these even semi-comfortable I'll need to sand a radius onto the edges of the floorplate and the bottom edges of the grip module, as I did with my XL grip module and 12 rd magazines. I'll also be ordering the MagGuts 10+2 spring kit. When it arrives I'll take some before sanding and after sanding photos of all three magazine floorplates and the grip module and post them here.

If I'm ever in a self defense situation where I need to draw I don't want any unnecessary distractions that I could have avoided. The feel of the stock P365 grip module is a distraction.

I consider this minor modification to the grip module and magazine floorplates equivalent to having a suit tailor fit to my body. And it gives me something to do while I'm listening to a podcast. The radiusing that I did to my XL grip module and 12 rd floorplates made my P365X fit my hand like a glove.
 
Oddly, the 365 really feels really good in my hand, even with the flat bottom magazine.
But different strokes...
Moon
 
Everything, including guns that have been around forever, is a calculated chance in terms of getting a "bad"one or not. Which is why a company's history of customer service, good or bad, can be a very important factor when committing money to a choice.
 
I also find the stock grip with 10 round mag flat baseplate a little small-ish, but when so configured it's amazingly easy to conceal, while providing 10+1 or 12+1 (with Magguts mag internals). It's a great little pistol.

Love my Shield but it's just not as easy to conceal, and due to control layout I'm prone to rest my thumb on the slide lock lever and cause failure to lock on last round. Never have that problem with the P365.
 
While I think Allen Bundy is perhaps overthinking things, he makes a good point about keeping an eye on magazine springs. I've had a couple go duff without too much shooting, I'm not replacing my mag springs wholesale. But I do keep an eye open for a sluggish one.
The NDZ springs are perhaps the only replacements available, and I've had great luck with using them. Without resorting to strain gauges, when a mag gets too easy to load, it's time to think about replacing the spring.
Too, if the last round is really hard to get in, and the mag really hard to seat against a closed slide, you likely have a spring stacking issue. Another reason to replace the mag spring with an NDZ. Or return the mag to SIG.
Moon
 
Two 365xls in this camp and we have never had an issue. They shoot everything they have been fed. I changed out the flat base pads on the 12 round mags to the ones from Tactical Development with the pinky groove. I also put the grip module from Wilson on mine and I really like it.
 
460Shooter said:
The P365 is shaping up to be a super carry option. I chose the Hellcat only because it fit my hand a little better. If the Hellcat didn't exist, the 365 is what I would have bought.
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I felt the exact same, until I got my hands on a Wilson 365 frame. Adds some bulk into just the right spots for my XL hands. Liked it so much that I had to get one of my own, though with the longer XL grip and barrel. Love it so far.

 

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JR24 said:
I felt the exact same, until I got my hands on a Wilson 365 frame. Adds some bulk into just the right spots for my XL hands. Liked it so much that I had to get one of my own, though with the longer XL grip and barrel. Love it so far.
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I put a Wilson oN my 320. I may do one on my 365. I wonder if it will fit in a sneaky Pete with it.
 
JR24 said:
I felt the exact same, until I got my hands on a Wilson 365 frame. Adds some bulk into just the right spots for my XL hands. Liked it so much that I had to get one of my own, though with the longer XL grip and barrel. Love it so far.

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Didn’t even know that was a thing
 
Ran another 100 rounds through mine the other day. Ran great! The areas of “concern” are getting polished/broke in nicely. I’m very happy with it.
 
I bought mine right when they first came out. I never have had any problems.
It is my EDC and I have fired a good many rounds through it.
I eventually changed to the XL frame for a better feeling grip and more ammo and a straight trigger as that is my preference.
 
I bought my p365 in the late summer of '18 - supposedly the batch after the problems were fixed. I had an awful time with the first 200-300 round. Half my shots resulted in a failure to battery. Even after thoroughly cleaning and lubing it persisted. But then it settled in and I haven't had a single problem since the very beginning. Just 2 day ago I bought the 365x to replace it as my carry. Applied a bit of lube before firing. After 200-250 rounds or so, I haven't had a single problem with my new gun.
 
365a_zpsbnvfsqhg.jpg
frankt said:
I bought mine right when they first came out. I never have had any problems.
It is my EDC and I have fired a good many rounds through it.
I eventually changed to the XL frame for a better feeling grip and more ammo and a straight trigger as that is my preference.
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Same here, my original 365 from Feb '18 has almost 8k rounds through it and has been perfectly reliable (though now on its third recoil spring).
 
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By the time I bought my 365 I was told by Sig that the primer drag had been eliminated. Mine was made past their 2019 date where primer drag was not happening. Much to my dismay it was still as prevalent as ever. Considering the fact that Sig had gone thru at least 3 different design changes for the striker I could not trust it and it was promptly sold.
 
Ran another 100 rounds through mine the other day. Ran great! The areas of “concern” are getting polished/broke in nicely. I’m very happy with it.
CNobbe said:
View attachment 1070475

Same here, my original 365 from Feb '18 has almost 8k rounds through it and has been perfectly reliable (though now on its third recoils spring).
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What were the signs that a new recoil spring was needed? Or did you just replace it based on Sigs recommended maintenance?
 
beagler said:
What were the signs that a new recoil spring was needed? Or did you just replace it based on Sigs recommended maintenance?
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The ejection started to change a bit. Actually, the first time I swapped it was because a guy from Sig was watching me shoot at a demo day and asked how many rounds I had through it. He popped a few through it and said he could tell the springs were wearing down. Same as the magazine springs, they'll wear out faster than the recoil spring. Short barrel autos tend to wear out their springs a little quicker, noticed this with my 3" Kimber 9mm 1911. It's just peace of mind more than anything. I think Sig recommends 5k for the 365.
 
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