When the P365 came out my main concern was the mag springs and I wondered if they would suffer or were they being over compressed etc. We are a few years in now so how is everybody’s mag’s holding up?

Take care, shoot safe.
Chris

They work fine so far, though when I was shooting the gun far more regularly I rotated through about 10-12 mags between my two P365s, so I doubt that any one mag has more than 300-350 cycles through it. Each one was a bitch to load in the beginning without help of a Maglula, so that definitely was a consistent trait.

Now that I've switched to the Shield+ for my secondary carry, I haven't shot either SIG in months. The two 365 mags (one 10rd, one 12rd) loaded with 150gr HSTs have sat unused even longer but I would expect them to work fine since the number of use cycles of the spring is generally of greater concern when it comes to magazine wear.

Thank you.

While the use cycles are typically at issue I have wondered if SIG or the others have “over compressed” the spring beyond its tensile limits so to speak to get the capacity and I have wondered if folks with mags sitting loaded have started to see any issues.

I am in no way saying that SIG must have or did over compress the spring beyond its limits just that, that was my concern when these itty bitty 10 round guns came out. I was wondering if a piper had to be paid so to speak and now that folks have some years on them I was just wondering if any issues have cropped up.

Good data point though.
Chris

OP, interesting question. Will be waiting to see the responses you get.

Having said that, a thought crossed my mind. Yes, the P365 mag capacity (10 & 12) is impressive and well-engineered. It seems to me that any respectable company and/or engineers would take the added stress into account. Could be use of materials selected for the spring, coil spacing, etc.

I have a base P365 with Wilson XL grip module. My mags are all 12 round. Once they were loaded to full capacity and left for about three weeks, I was able to load round 12 by hand with no problem.

Having said that, my spare carry mags are loaded with only 11. The difference in seating force required between 12 and 11 is quite significant. In a high stress reload, AKA gunfight, it is possible to get a failure to fully seat (closed slide) on a fully loaded mag insertion. Hence 11 rather than 12 for spare mags. IIRC, Ken Hackathorn once mentioned this in conjunction with G19's and G17's used for carry. I carry my G19 spare mags fully loaded, since the degree of resistance on reloading is acceptable. Not so in the P365. Make your own choices, but it makes sense to me.

This message has been edited. Last edited by: Nipper,

I've had my P365 for around 15 months now and see no indication that my mag springs are getting tired and I shot it at least once a week for that whole time frame.

I have bought replacement mag springs over the years for many guns that I shot a lot. I have never wore out a mag spring. Ever.

Obviously anything wears out. Maybe because I tend to shoot a bunch of guns so no particular mag gets all the use. Even so, I do have a few guns that have been shot a lot, loaded a lot, etc., never had an issue.

On another forum Chris and I were discussing whether a manufacturer adding a +2 to the same mag body, same baseplate basically theoretically or practically makes the mag less reliable. Specifically the HK mags. HK has always been low capacity to size in their mags. Recently they bumped them all up +2 which makes them size wise comparable to their peers. It made sone guys go bananas.

I think magsprings are way tougher than we give them credit. This is an interesting topic but I won’t lose sleep over it unless we start hearing anybody talk failures.

This is a valid question, no doubt, given how the geometry of the P365 magazine borders on defying the laws of physics by managing to get 10 rounds, spring and follower in that small space.

If I used a P365 I, too, would be concerned about spring fatigue.

I generally have no “worries” (might be too strong of a word) in regards to “regular mags” such as the HK 15-17 as there is more then enough tube to contain plenty of spring as is spring “tech” able to keep up.

Where I started thinking, which granted usually doesn’t beget good things , was the introduction of the 365/hellcat. The mags in person are absolutely tiny and the guns themselves are truly a bit of a paradigm shift.

My concerns were, how did we get here and why did it take so long. So was the industry working at or past the hairy edge to bring a new/arguably awesome product to market. So I have been sort of watching these over the years to get a feeling if the engineering and materials were there or did we give up some reliability durability for a couple rounds.

Again this is not me saying THESE WILL FAIL or THESE COMPANIES DID NOT X,Y,Z as I doubt they would especially with the P365 being an approved backup in many PD’s. It’s just my curiosity and possible ignorance that wants some longer term data points on this itty bitty mags.

I do appreciate all the feedback. I MIGHT buy one of these at some point and this is my hesitation or “sticking point” if you will.

These guns (and magazines) have now been out in the wild for a bunch of years now, with at least a million, and maybe a few mollion, in circulation. Given how quickly and widely known the guns' initial teething problems became, if mags weren't holding up, I'd bet that complaint would be out there, and in here, already. The mere fact that the question has to be asked explicitly in light of the lack of complaints suggests that it's a non-problem

quote:

Originally posted by parabellum:
This is a valid question, no doubt, given how the geometry of the P365 magazine borders on defying the laws of physics by managing to get 10 rounds, spring and follower in that small space.

If I used a P365 I, too, would be concerned about spring fatigue.

Actually, my mags are all 12 rounds.

My point remains the same.

If this is a valid concern, which it may be, the mag that jumps to the head of the line is the Hellcat Pro mag. It is 15 rounds in the same size as the 12 round Sig 365 mag. I have never seen them side by side in real life but on Handgun Hero they are nearly identical in size but hold 3 additional rounds. If it has no issues it is the undisputed king of mags.

I suspect BBMW is right in his post, but I figured I’d ask. The P365 is the ONE modern SIG that has intrigued me from the start in all (well most ) of its iterations.

Yes I’ve handled that Hellcat 15 round mag and it’s a little mind bending. . Honestly so is the P365 Macro, until you handle one you really don’t realize how small it is.

As always I appreciate the input.

Take care, shoot safe.
Chris

Mine have held up fine but have not been used like my normal heavy shooting guns. Or competition guns.

PB

I recently bought a 365x. At first I couldn't get the 12th round in the mag. After a few loadings things loosened up. After a couple of days they worked fine. I leave the gun loaded with a chambered round and 11 in each magazine allowing a tactical reload.
I had a concern about the floor plate giving way, but haven't heard any reports of that happening.
I carried a 5 or 6 shooter for many years, so leaving the 12th round out doesn't bother me much.

Might be easier to ask people to post who've had mag spring problems.

I have an XL with three magazines.
One (12 rounder) has had a Magguts +2 spring kit and all seem to be functioning fine. Zero problems.
Mine is now over a year in and it's a daily carry and the one I shoot most at the range.

Without cking my records, and guessing that I have ~3000 rounds through mine, the mag springs are just fine and feeding and reliability remain first rate. It's my DTD, #1 choice for CC. I've posted this Pic previously but here's one of my first full mags of AE 124 FMJ's from ten yards, shot offhand, no support. The gun's an outstanding carry piece. R