I carried a WALTHER PPK in 7.65m.m. or as we call it, .32ACP for several years as my off duty gun. It replaced the 5 shot .38 Special revolvers that I had been using. I choose it because I wanted to carry a semi-auto pistol as my service gun was a BERETTA 96. The PPK fit in my pocket without printing and proved completely reliable and was capable of decent accuracy. I replaced in with a GLOCK 42 in .380ACP, which was similar in size, but thinner and lighter. Also, it would not rust and had much better sights.
I have also carried a BERETTA .32ACP Tomcat on occasion and gave one to my wife. She has trouble retracting slides, so the tip-up barrel was perfect for her. I also like that feature, but I found that the Tomcat was a very reliable, easy to shoot gun, despite its small size. It is barely larger than most .25ACP pistols. Until S&W brought out their EZ pistol in .380ACP, I thought that I might end up going back to the Tomcat, when I got older and had problems retracting the slide.
I have a NAA .32ACP Guardian, which is all steel and as heavy as the Tomcat, but more compact. I thought it would make a great really deep concealment piece, but it is a hard pistol to shoot. A 50 round shooting session leaves my hand hurting because of the small size of the grip. The BERETTA was much better.
I tried a KEL TEC, but it jammed and I lost faith in it.
I have owned several other .32ACP pistols and would not hesitate to use them if that is all I had. I would practice the failure to stop drill my agency used for many years. I would also try to limit my shots to closer range than when I have a 9m.m.
I much prefer a 9m.m. loaded with FEDERAL HST or even a .40 S&W, but you do not always have the choice. Except for my SIG 365, I cannot pocket carry any of my 9m.m. pistols and the SIG 365 is not nearly as easy to shoot as my BERETTA, SIG or STOEGER.
Jim