I've carried a stainless Interarms PPK/S for 10 years or so as a BUG and off duty concealed carry. As with most fixed barrel blowback operated handguns, mine has proved to be
very accurate and it's reliable (after I weeded out some magazines).
I'd originally bought it for my wife, but she could not pull back the slide so I ended up keeping it for myself. It's a good carry gun, but in .380 ACP it's not much fun to shoot. I have to do a 50 round qualification with it twice a year and it is very unfortable to shoot and if I'm shooting more than a magazine at one session I have to wear a shooting glove. I usually carry Federal Hydra-shok or Winchester Ranger SXT jacketed hollow points and I've not had any problem with feeding.