Reloads for a Sig P365-380

[lewmed]

 The only factory ammo that I have found that works in my pistol is Federal HST at over $1.00 per round I need to find a bullet and powder combo so I can load my own. All the factory FMJ that I have tried and all my reloads that work fine in my Sig 238 won't even cycle in the P365-380 most won't eject and hang up in the ejector and the few that did eject don't let slide go back in battery. Those few that did cycle just barely make it out of the ejection port and none will lock the slide back. I fired about 150 rounds single shot and then ran the slide by hand about 200 times then cleaned and lubed it a couple times with no luck. Right now I have a accurate soft shooting single shot pistol.
 I called Sig service and was told to shoot a couple hundred more rounds of SD ammo through it and to get back with them with the results.

[SI VIS PACEM PARRABELLUM]

If it won't cycle and fire standard factory ball ammo then it needs to go back to Sig period.

[E.Shell]

I would agree with SI VIS PACEM PARRABELLUM, it should cycle any ball ammo and most HPs.

One thing that occurred with the early P365 .380s is that the end of the recoil spring would twist back and lap over the next loop of the spring, causing a bind. It is a very strong chance that's what's going on with the OP's gun.

Remove the slide assembly and remove the recoil spring from the slide. Examine the recoil spring assembly and ensure that all of the spring coils lie flat and are in place. If the end coil has lapped back over the next coil, that's the issue.

Sig has been sending replacement recoil spring assemblies out to those with this problem. Take a picture of the bad spring and call Sig for instructions.

While I agree this is a warranty problem and the gun could/should go back to Sig, it will be much simpler all around if Sig just sends you a new spring (assuming that's the obvious problem).

[lewmed]

 The recoil spring was the first thing I checked it's fine.  I'm thinking I may have an out of spec extractor that is gripping the fired case too tightly.

[lewmed]

 Removed the extractor and polished it's sides and the hook now it's working well with all my near max reloads and SD ammo. It just won't cycle 100% with range ammo like Foicchi Dynamics and Armscor FMJ.

[lewmed]

 Today I made my third trip to the range with my new P365-380 and I'm happy to report that I was able to fire 200 rounds with only one stoppage. That was a rather expensive break in period it took over 400 rounds before it was reliable.

[Wobbly]

This should be explained in the "Factory Ammo" section of the stickies, above.

Take the type/brand ammo you would like to be shooting (that which is locally available to you) and then replace the gun's recoil spring with one that is several pounds lighter. IOW, if your gun currently is running a 20lb spring, a conversion to a spring between 14lbs and 16lbs should allow the gun to cycle.

Simply stated... The "power" of the spring is simply chosen to counteract the "power" of the ammunition.

Then, you will insert the stiffer stock spring when you are using high powered "self defense" ammo. And, conversely convert to the lighter spring when on the range practicing with your low-cost, low-power ammo. You will in effect be tunning the gun to the ammo. This is a much lower cost alternative than tunning the ammo to the gun... which would mean buying a reloading setup, learning how to reload, buying hard-to-find components, etc, etc.

Hope this helps.

[Wobbly]

Also, look at your lubrication.

I would highly advise you to remove the slide and apply one drop of SYNTHETIC motor oil (any brand, any weight) to each of the following locations...

• Left slide rail
• Right slide rail
• Barrel at the bushing
• The hammer pivot point

The remaining amount left in the bottom of a bottle of engine oil is typically enough to lubricate several guns. If you have an old eye dropper, you can fill that for the range bag, which is always nice to have along too.

[lewmed]

Unfortunately the Sig P365-380 has a two part captured spring assembly so changing springs isn't that simple. I should have checked customer reviews before buying the P365-380 there are many people with same problem I had. The only factory ammo I normally buy is for self-defence so I'll be ok running my own 1000+ fps reloads from now on.

[Wobbly]

Make your own standard recoil guide rod, and slip a spring over it. Or better yet, use a similar length one from a P10c or some such. Just because the OEM unit is "captured" doesn't mean the replacement needs to be constructed the same way.

When you figure out the combination that works, then you can make millions selling them on eBay.