I have a suggestion that may seem unnecessary to fix the issue with the Fiocchi ammo.

On all my semi-auto handguns, I use a Dremel with a felt wheel loaded with Flitz polishing compound to polish the barrel feed ramp when I clean the handguns. Including outside of the barrel that touches the inside of the slide.

I never have a feeding issue including 9 mm and 380 reloads on my P365s, LCP Max, LCP II in .22, S&W Compact 22 (especially important for buffing on the .22’s) and Springfield XDs .45.

I usually have no more than three to clean at a time and buffing the feed ramps for all three takes less than 2 mins. The feed ramps get polished first then cleaned up with Hoppe’s No.9.

About twice a year depending on how many rounds are used in each handgun I will strip the guns down to parts and pieces to polish all metal that touches metal. The video below explains how to do it in detail

If nothing else comes out of polishing the barrel feed ramps, you will eliminate one variable and smooth out your ammo feed into the barrel.

 

Fiocchi .380 is well known not to run in P365-380 pistols. We use Remington .380 without any issues.

 

my wifes .380 365 has been running good on fiocchi 95g training dynamics ammo, so far 500rds through it.

 

Remington doesn't run well with either of my 365's. That is the only ammo so far that causes issues.
And Fiocchi stumbled in my Bersa pistols.

I think its kind of a trial and error. Some works well in one gun- but not so well in the next.

 

And Glock 42's will NOT run Privi Partisan. They just flat out refuse. They had no issues with Fiocchi though. And my friend's P365 will not run Norma .380, but her P238 and mine love it.

Find the .380 ammo YOUR gun loves and use that one. If you have more than one .380, find the favorite for each one. You might get super lucky and find one brand that they all love.

Good luck. 👵

 

My Interarms Walther PPK/S is a bit picky but loves PMC Bronze...might give that a try.

 

Kahr 380s don’t like Fiocchi either. I heard it has something to do with the COAL.

 

Only issue I ever had so far with my P368 .380 was with Fiocchi

 

The P365 in .380acp appears to be the same design as it's 9mm counterpart - i.e. a locked breech recoil operated pistol.

Many .380acp pistols (for example the Walther PPK) are direct blowback design. This is possible because of the lower power of this cartridge. You can't do direct blowback once you reach 9mm Luger cartridge power levels.

It also means that in the P365, there is quite a bit of mechanism mass and friction to overcome with the lower power of the .380acp cartridge recoil. The mechanism absorbs much of this recoil energy, making it a very soft shooting firearm, but it also means that there isn't that much energy there in the first place to operate the locked breech mechanism.

This means that you have to do your job in providing a solid platform for the firearm to recoil against. It has to be consistent meaning that your grip and stance has to be correct for every shot and that the firearm cycling is more sensitive to it.

Different cartridge manufacturers may load to different energy levels. That could make the design more ammunition sensitive as well, accounting for these experiences. As with anything mechanical, your experience may vary.