Have been carrying a Kahr P380 for a couple of years when I can not carry a larger gun. Started off carrying CorBon .380s with the 90 grain Sierra bullet as they were about 100 fps faster than the rest I had chronoed. Later I went to the CorBon PowR'Ball.
Last year started carrying the Underwood Xtreme Defender using the all copper Lehigh bullets. Now also using them in my primary gun also...
...or if you want something deeper penetrating...
Bob