I replaced my Glock 42 with a SIG P365

[zaitcev]

My G42 guns always provided me with an outstanding, impeccable reliability. However, that was while I carried off-body (in a fanny pack and other such means). A couple of years ago, I switched to OWB/IWB method. After that, my trusty G42 started to make a burble.

And it wasn't a regular kind of random malfunction, it was systemic. It always occurred after I carried it for a long time (couple of months) without shooting it, and it only occurred after the first shot. The round nosedived under the feed ramp.

Once I cleared the FTF, the gun would run flawlessly basically forever. Like always, it made 800 to 1,000 round strings between stoppages. The problem only occurred after drawing.

At first I tried to control the issue by changing the ammunition, all the magazines, and the RSA. Because each test required to carry the gun around for months, it was a very slow and murky process. In the end, I gave up and bought a P365. It feeds smoother and is thus more reliable against this particular problem at least.

 

[Zendude]

Did you get the p365 in 380 or 9mm ?

 

[starling]

Very strange malfunction going on there. Everything would point to it being magazine related. Ill take a guess and suspect that the magazine spring or follower is somehow binding up when the mag is at full capacity and set into the pistol for prolonged periods of time. Sounds like the follower developed a hitch when at full compression against the spring. I guess there could be a burr in the magazine tube catching the follower but you would probably see it when cleaning. You should be able to trouble shoot it. If no marks are visable on the follower showing strange wear the first thing I would try is downloading it by 1 round to see if you can reproduce the nose dive.

 

[zaitcev]

Photo of the units in question:

 

[sparkyv]

I've been greatly satisfied with the standard P365 for several years. Full disclosure, I've never cared much for Glucks, but your issue is surprisingly unusual, zaitcev.

 

[WrongHanded]

Sounds like the rounds were sticking to the sides of the magazine and stopping the follower pushing the top round up. Humidity, dust and time can create additional friction.

I can't remember if it was a Glock or a P22X Sig, but I had a gun that did that a couple times. Now I will pull my carry mag and plunge that top round down a few times, usually once a week or so. If it springs back, I know it's okay.

 

[WVRJ]

365 is a hard gun to beat in its class.I have a 365 and a 365XL.Both are reliable to the point that it takes making bad ammo on purpose to stop them.The XL is what I carry and it's reliable and very accurate for a small pistol.I can shoot the 365 good also,but my wife laid claim to it which made it ok for me to get the XL.I think you took a step in the right direction.

 

[WisBorn]

As people that carry a firearm daily I can't stress enough the importance of frequent cleaning.
We wash our clothes because they get dirty from sweat and the environment. So do our handguns.

Magazine issues are the biggest reason for semiautomatic pistol failures. They need to be cleaned.

 

[kje54]

What???!!!! We're supposed to wash our clothes???!!!!!

Nobody ever tells me anything.

 

[Alllen Bundy]

The internal finish quality in a P365 pistol can vary considerably. The stripper rail on my P365 (Born Summer 2020) put deep scratches into the shell cases and it was very difficult to retract the slide over a magazine loaded to capacity. I had to polish the stripper rail to fix the issue. But this was not a problem with my P365XL (Born summer 2022).

You don't normally retract the slide over a magazine loaded to capacity, so many people do not realize they have a problem unless they need to clear a malfunction. Just check this to make sure that you don't have an issue.

 

[MikeInOr]

What???!!!! We're supposed to wash our clothes???!!!!!

Nobody ever tells me anything.

It never ends... next they are probably going to start telling us that we need to wash our underware too!

 

[WisBorn]

Maybe I should not have used the example of cleaning our clothes.
I do know that many people that carry a firearm neglect cleaning them!!!!

If it has been several months since shooting the handgun (as the OP mentioned) and it has not been cleaned I would look there first.
I would also recommend carrying the firearm loaded with only what magazine capacity is. No +1. I have found that if I have a failure to feed it happens more often with a full magazine +1 and the first round cycling from the full magazine jams.

 

[Alllen Bundy]

It never ends... next they are probably going to start telling us that we need to wash our underware too!

Stop wearing underwear and you won't need to clean it!

 

[zaitcev]

Speaking of underwear, P365 OWB requires an undershirt, G42 does not.