I've started having a problem with my P365 not ejecting the spent case and jamming with the incoming round. The spent case stays in the barrel chamber. I don't know how many times the brass has been reloaded and was wondering if weakening brass could be the issue. I've been reloading for over 30 years and this is a first. No problems with the same ammo in my G19.

Does it extract and eject
factory loads and
reloads in once fired brass?

I only tried a few factory loads that I had and it did fine with those. I plan on experimenting more this weekend. I've just never had this problem before.

What is the load? Could it be weak or with a less than optimum(slow) powder?

I’d take the barrel out & do the ‘plunk test’.

The load is 4.5 grs titegroup with 115gr bullet. I've been using this load for years with no problem until recently.

Yes, that load should cycle just fine.

At first blush I'd say your extractor is the place to start looking for the problem. I'd suggest you shoot a few magazines of your hand loads and a couple of magazines factory ammunition.

If the extractor is bad you should experience this problem with all the ammunition. If only your hand load fails to extract the problem is with your pistol. If that happens it would help a good bit if can post some clear close up pics of the fired cases from various angles.

From the information in your post I would guess you have a damaged extractor.

FWIW

Chuck

I had a similar problem with my RIA and I started using the Lee carbide factory crimp die and it fixed things.

Thanks for the replies.
I just shot 40 rounds of winchester 115 gr and about 30 of my reloads. It failed to eject one of the winchester and 2 of mine. What I can't figure is why it just started doing it. I ordered a new extractor kit and plan on trying that.

The new ejector didn't fit so I'm going to contact sig about that. I ordered and receive the lee factory crimp die and reloaded 100 round using it. I also purchase 50 rounds of federal 115 gr. fmj. The new reloads with the lee die worked fine as did the federal ammo. I did some measuring of the reloads that were causing the problem and can't really find the difference. Anyway the problem seems to be fixed.
Thanks for your help.

Sounds like it’s mostly fixed.

My son’s friend friend had a jam with his 320 years ago. They left it for me when I got home, action jammed with case or round, forget if empty.

I first cleared the gun, yes extra force. After that I noted the newly purchased gun, year or so prior, was desert bone dry. On top of that he was using steel case ammo, also bone dry.

I disassembled, cleaned & lubed his gun, later a few comments about lube and care. Never a problem again.

I’m sure your gun is in top shape, just relating a story that may not pertain.

I have the XL and use 4.7 and 4.8 Titegroup with 115 grain without a problem. I did have a few with 124gr and 4.2, loaded some 1 & 2/10 hotter and problem went away for what it's worth.