Smack it in there... you won't hurt it.

 

Leave mags fully loaded to compress/loosen springs a little. As stated above, smack the mag base when seating it, no gentle push. Guns cycle faster than we can move so no harm in smacking mag base with heel of palm.

 

I've had three P365 chassis pistols now (P365, P365XL, P365X). You are describing what I would call normal operation.

The P365 magazine design, combined with shorter barrel + very strong RSA, results in an extremely tight fitting lockup. This means there is a lot more pressure on the rounds, upward, than you will have with say a double stack Glock.

When the guns are new, you will need to insert the mag with a lot more oomph than before. As in, really smack it in there. If you are new to P365s, this may seem unnatural. Shooting the gun more will help the parts wear in, and this will settle itself out. The mags will be easier to load (I find a Maglula really helps) and the insertion required less forceful.

If after shooting it a bit more, you are still not satisfied, I'd give Sig Customer Service a phone call and discuss your findings with them.


On the other hand, if you just don't like the gun, you should sell the P365XL and buy another Glock 26. Life is too short to put up with things which make you unhappy, especially with so many choices in handguns these days.

 

As said the spring is very very tight. Load one in the chamber and only 11 in the mag if that makes it easier. I know that does away with 13 total but I'm not a huge fan of all that spring weight on the 12th Rd like that. As above said, load them and leave them loaded somewhere so the spring loosens up some.

You can smack that thing in there. Just do in safe direction.

Start with 11 though then after a few weeks try that #12 in there. Should work fine then.

 

I have a 26 also. Just to thick for me to carry daily. Heavy as a brick. Plus the short grip is a pain on that. Still will outshoot the 365 any day though. Internal laser on her makes her super sweet.

 

Make sure all rounds are pushed rearward as far as they can travel when inserting them into the magazine.

 

Just go back to Glock ..

 

I had the same issues with my P365 you are having. I bought a Maglula and made loading the 12 rds. much easier I left the rounds in the mags for a week or so and it loosened up some but it will always be hard to load. I can load my mags now by hand. I also made sure my slide was always pulled back when I inserted a mag and as said many times hit it hard!

 

Found the same thing when I was loading mine yesterday for initial break-in. What I'm planning is to load to capacity an let set for a week or two (as outlined above). I have done this in the past of others that had stiff springs to help them settle some. And yes, I had to smack it in to get it to seat and I have had to do that with Glocks mags in the past as well.

 

Shouldn't take much effort at all to seat the mag if the slide's open, which is how the manual says to do it. After some spring break-in, it's not that hard with the slide closed. At least on mine it's not.

 

Same thing for me. I bought my P365 in the Tacpac with 3 12 round mags and found them impossible to load without my Magula. Then, when I went outside with that first mag, I couldn't get it to seat, even with a firm smack. I racked the slide and the mag seated. Then, instead of closing the slide with the slide lock release button, I tried to simply pull back the slide and let it go (like most of us are familiar with). I was quite concerned but got the slide closed with the slide release. Gun shot great with no hiccups on that first mag.

I called Sig and told them what I'd experienced and they suggested what's been suggested here - fully load the mags with a loader and let them sit for a few weeks and see if that doesn't solve the issue. It did. I still use the loader as it's just sooo much easier but just before I wrote this response, I grabbed a fully loaded 12x round mag, inserted into my pistol with a closed slide and seated it with a gentle tap and then pulled the slide back and released. Round chambered, slide closed. Dropped the mag, cleared the chambered round and all is as it should be. However, I need to put the last round back in the mag with the loader.

I love the Glock design, in general, and my former 26 and 36 were easier to load and shoot but I didn't like either as CCWs. I have a 17 and a 19 and both them them are better for hiking and HD. That said, I WANT a manual safety on a CCW and the P365 offers me that. So that's why I now CCW a P365 with a chambered round unlike my Glocks or LCP. I know some of you internet operators carry like you're spec-ops guys but I'm not and in over 50 years of shooting and carrying firearms, I've never had a NG. You do you, I do me.

 

I only load 11 until the mag is broken in.
Carry an extra mag if you need more than 11...

 

Yeah that works too, but for the full 12 +1 capacity when it goes into summer rotation I'll need to insert a full mag on a chambered round, and yes I always carry at least 1 extra mag

 

Normal operation...lock the slide open, slide the mag in, release the slide...no more issue.

 

Great information all. Tried smacking it in and it worked. Plan to leave fully loaded for a week or so. Thanks to all!

 

Try a few weeks.

 

It will take a while to soften that magazine spring. Either muscle it or use a mag loader for now.

 

I keep all of my mags loaded all the time. The spring experts say a spring lightens up using it not just loading and letting it sit. I have a gun ordered and bought 4 new mags for it and in the evenings I have been using a mag loader and loading and unloading them. Probably each has been loaded and unloaded at least 50 time. Most of them I am able to load by hand now. They are 9 rounds single stack which are usually easier. The little short double stacked are tough for a long time. Most of the time I use a mag loader and have to load one short until they are used a few times. I keep a mag loader on my loading bench and one in my range bag.

 

Had the same problem. Took 4-5 mag dumps before the problem went away. No problem loading to full capacity since.

 

Another strange thing I noticed today was that if I put 12 rounds in my 365XL it will not fully engage. It actually falls out, no matter how much pressure I put on it. Another *** regarding my sig 365 XL

i really regret selling my Glock 26 and 30SF 45 after the issues I have had with Sig. I am pretty disgusted. BTW both of my 365s were made in December of 2021. Maybe the crew was eager to break for Christmas or they did not give a good ****? Perhaps it was just luck of the draw and stuff happens but pretty strange that the only failures I have ever had have been with Sigs. I have been shooting for over 3 decades so I have pretty good reference points. Whether it is a car or anything mechanical if it is not reliable I will dump it.

Also, magazine seats easily if the slide is retracted. Previous answer is accurate - smack it in!

 

I don't think many are understanding the OPs post here. I believe they are saying if they try to insert a 12 round magazine into the gun it won't fully seat and falls out. Nothing mentioned about getting 12 rounds in the magazine.

OP you can simply down load the magazine to 11 rounds or just sell your Sig and go back to Glock. A third option would be to insert the magazine with force, it will work and get easier the more you cycle the magazines by shooting the gun.

 

Another strange thing I noticed today was that if I put 12 rounds in my 365XL it will not fully engage. It actually falls out, no matter how much pressure I put on it. Another *** regarding my sig 365 XL

i really regret selling my Glock 26 and 30SF 45 after the issues I have had with Sig. I am pretty disgusted. BTW both of my 365s were made in December of 2021. Maybe the crew was eager to break for Christmas or they did not give a good ****? Perhaps it was just luck of the draw and stuff happens but pretty strange that the only failures I have ever had have been with Sigs. I have been shooting for over 3 decades so I have pretty good reference points. Whether it is a car or anything mechanical if it is not reliable I will dump it.

Rack the slide then insert the mag.
Release the lock catch and chamber a round
It'll take time, but they will bed in the more use they get.

Another strange thing I noticed today was that if I put 12 rounds in my 365XL it will not fully engage. It actually falls out, no matter how much pressure I put on it. Another *** regarding my sig 365 XL

i really regret selling my Glock 26 and 30SF 45 after the issues I have had with Sig. I am pretty disgusted. BTW both of my 365s were made in December of 2021. Maybe the crew was eager to break for Christmas or they did not give a good ****? Perhaps it was just luck of the draw and stuff happens but pretty strange that the only failures I have ever had have been with Sigs. I have been shooting for over 3 decades so I have pretty good reference points. Whether it is a car or anything mechanical if it is not reliable I will dump it.

Rack the slide open, then insert the mag.
Release the lock catch and chamber a round.
Will take time until the mag springs bed in.
The more you use them, the better they will get.
Have patience, they're engineered well, built to last that's part of the reflection of the $$$$

 

As others have mentioned and since this seems to be one pain point for every 365/365xl user, load 11 and call it a day.
I see so many people going out and buying different springs and different gadgets to get 12 rounds in a 12 round mag.
I get it, I really do, if they advertise 12 then it should hold 12. It will hold 12 but even after sending hundreds of rounds through all of my 365 mags, they are still very tight on the 12th round.
My UpLula made it easier but when it was all done and said I stopped fighting with it and settled on 11.
Even with my X Five Legion, that 17th round is tough but not impossible.
Should Sig change up their design...sure. Will they...maybe.. but not likely.
I know some have had issues with their 365s but my XL, I trust my life with it. If 11 rounds will not stop a conflict then the way I personally view it, the 12th round wont make a big difference.
I shoot regularly I train regularly, Im not a professional shooter by any means, but I typically hit what I shoot at with some dependable accuracy.
As some have said if you want more than 11, carry an extra mag, but I say... train harder, training will save your life faster than that 1 extra bullet.

 

Another strange thing I noticed today was that if I put 12 rounds in my 365XL it will not fully engage. It actually falls out, no matter how much pressure I put on it. Another *** regarding my sig 365 XL

i really regret selling my Glock 26 and 30SF 45 after the issues I have had with Sig. I am pretty disgusted. BTW both of my 365s were made in December of 2021. Maybe the crew was eager to break for Christmas or they did not give a good ****? Perhaps it was just luck of the draw and stuff happens but pretty strange that the only failures I have ever had have been with Sigs. I have been shooting for over 3 decades so I have pretty good reference points. Whether it is a car or anything mechanical if it is not reliable I will dump it.

Sig mags are tight and the mag spring will relax after usage.
Sig guns and magazines are not delicate things. As others have said, thump the back of the mags on a flat surface (like one does to Glock mags) to insure proper alignment of the rounds. A whack the heel of the magazine as needed if it doesn't lock into the P365.
Practice doing this -- you can use snap caps for practicing when you are off the range, etc.
Pistols and magazines are mechanical and need use to wear together.
People are timid and need practice to understand how to do things.

 

I can get all but the last one in by hand on my brand new mags now after a week. Use the loader for the last one

 

I've posted this elsewhere here; some SIG mag springs don't 'nest' properly. I had a 12 round mag that would only seat with 11. Ordered some +5% replacement springs, which solved the problem.
Moon

 

Most guys will suggest that the mags should be loaded and left for a few weeks, that will break in in the springs. While that probably helps a bit, what really helps are full cycles of loading and unloading (shooting).
That is more effective at breaking in the springs, not leaving them loaded.

You can leave a magazine loaded for a few decades, and the spring will not have shortened or weakened over a new spring.
I'm not an engineer or metallurgist, but if you asked one, they'd tell you the same thing.

As halfmoonclip mentioned, if the springs don't nest properly, it would make seating the magazine on a closed slide more difficult.
These magazines are engineered to get a lot of rounds into a small space, not much room for leeway.