I would NOT carry a two shot anything as my primary CCW. Having said that I'll relate a personal experience.Without all the filler, the story is, I was shot down and captured by soldiers of the NVA.I had previously carried a privately owned Python through two tours in the "Pearl of The Orient". Knowing the Army was getting tough on privately owned weapons[POW]I chose not to risk the confiscation of my gun the third time around,I started looking for alternatives. I had about settled on a J frame lightweight until I gave a thought to my High Standard .22 Mag Derringer.Testing on blocks of laundry soap and wet phone books showed me that the .22 Mag Winchester 40 gr. jacketed HP was as good or better than the .38 Spl. To put a point on it , I smuggled the High Standard into country. When captured by two stalwarts of the NVA, they took all 3 of my knives , my .45 pistol, my wallet[Geneva Convention card] my cigarettes,lighter and my boots.What they didn't find was the High Standard hidden away inside my flight jacket. After several hours of walking the wrong way[for me!] they took a break on the trail. One went into the woods to answer the call of nature, the other was eating a rice ball. Since he wasn't going to share any food with me,I mimed that I wanted a smoke. He gave me my cigarettes and lighter. When I put them in my pocket he looked askance at me. The last thing he saw was a.22 Mag in the eye.His partner came running out of the woods with his AK in his left hand and his britches in his right. My next shot hit him in the collar bone and disabled him 'til I could get the first ones AK.Two observations,first their mother raised stupid children, second, the .22 Mag,when well placed IS DEADLY.Again, I wouldn't want one for a primary carry gun but as a deep concealment back up I trusted my life to it and it did not fail me.I still have the High Standard but if I need deep back up these days I carry a NAA .22 Mag revolver.I hope I haven't bored anyone with this recollection. Nick