The Kahr .380 is a bit underpowered with jacket weather just around the corner.
I don't own a 380, because when I purchased my R9 most 380 JHPs were stopping short at 9" to 10" of penetration in the 4 x Denim gel tests and the FMJs were zipping right through 4 layers of denim and zipping right out the back of the 18" gel blocks.
I sort of though why get a 380 when I can get a 9mm almost the same size (the Rohrbaugh R9).
But I also have a theory, This is just my opinion on this but I'll put it out there.
In the late 80s and early 90s the FBI was driving bullet design and development for the 9mm and 40 S&W, and we saw tremendous improvements in bullet designs and terminal performance for those calibers. IMO though, the ammo manufacturers didn't put nearly as much research or development effort in the 380 ACP. They did however, slap their name brands on the 380 cartridges, which gave the impression that 380 rounds like PDX and Golden Saber were going to perform as well as their big caliber cousins. What we saw though is that many of these name-brand cartridges don't do any better than any of the other 380 loadings out there, and don't do that well in general.
Now we've seen a boom in the 380 ACP pocket pistol market with many owners who are intelligent shooters with good knowledge of terminal ballistics now looking for 380 cartridges that perform well out of the 3" barrels.
I think that is creating a market for someone to create bullet designs and loadings that penetrate 4 layers of denim and penetrate to around 13" of gel with some (controlled) expansion, out of 3" barrels. It will pay to do real design work, test the bullet, re-design, re-test and re-design to get a bullet that will reliably penetrate 13" in gel through 4 layers of denim.
I think we will see improved 380 ACP performance in the future. We're already seeing interesting designs like the Lehigh Xtreme Penetrator.
http://www.youtube.com/watch?v=LczfeWK9lHwSo I just thought I'd put that out there - these 380 ACP Lehigh Xtreme Penetrators are not going to be stopped short by heavy winter clothing.