Who has first-hand knowledge of the P380?
Pros and Cons would be a plus.
I have one. But its reliability leaves much to be desired. It doesn't have any.
At the moment, my P380 is in Kahr's hands being reviewed for severe functionality failures. Inability to cycle, mostly feeding. I'm sure it's just a problem with the chamber throat and feed path being a bit too restrictive to handle various ammo, possibly exacerbated by the extractor. We'll see. Once that gets sorted out, I am hopeful that all will be well.
A Kahr CW9 that I have is fairly reliable and wonderful to shoot. It makes an excellent carry gun as well. The P380 is one that I'm intending to carry in the pocket as a go-anywhere type gun where my regular daily carry gun won't do.
Accuracy is a real plus, in the P380 as well as the PM9. I don't quite know how Kahr does it, but these puny pistols are quite good in the accuracy department. Once I learned the timing of the cycling and recoil, it got fairly accurate. IMO, the P380 is certainly a 1-7yds type gun, whereas the PM9 reaches out a bit farther. Accuracy within this range is very good, for me. Handspan distance, at nearly any speed of shooting; much tighter groups, with little effort and by taking time to "aim small."
Kahr makes a heck of a package: the size, weight, flatness, concealability and general quality of the parts combine for a combination of traits that few other makers have attempted or equaled. IMO, the PM9 and P380 are, bar none, the best micro carry packages going, if you can avoid examples that have reliability issues.
One thing I think you'll find is that the frame design that Kahr uses results in something just wide enough to spread the load of recoil such that it's a pleasure to shoot in spite of being so small. Compared to the PM9 or P380, any pistol of comparable weight seems to beat up the hand during extended shooting, while the Kahrs just eat up the shots without much pain being inflicted on the hand. They're thin enough to conceal easily, but thick enough to fit well into the web of the hand and spread the force of recoil well. That's a nice feature.
Pearce makes the magazine base plates for the Kahr magazines. If the PM9 or P380 doesn't have enough height for your comfort level, not allowing enough grip to suit, you can swap the Pearce base plate into each magazine and you'll then be able to add another finger onto the grip. On the P380, it makes all the difference. With the right pocket holster, it doesn't affect concealability either. (Though, on the PM9, I found it did on a couple well-designed pocket holsters, being that much larger than the P380. YMMV.)
The one issue with being single-stack and so small is: capacity. There are only so many bullets you can stuff into a puny pistol. The P380 takes 6rd mags. If you're comfortable with a revolver on you, then this shouldn't be a problem.
Bottom line: If you get a reliable one, or can work through the massaging to get it to the point of being highly reliable (as with any carry gun), I think the PM9 or P380 will be one of the best carry guns you have.
My $0.03.