Fun to shoot for sure. Just got back from the range after shooting my .22 Mag Derringer and breaking in my new Kel-Tec P3AT. I had more fun with the Derringer and was surprised to find that I did better with it at 21' than I did with the .380 Kel-Tec. (haven't fired the .22 Mag in several years) To be fair I have to mention that after about 20 rounds of .380 the P3AT started to hit much better and I managed to get 4 in the center ring. Got six in the center ring with the .22 Mag Derringer with less than half as many rounds spent. Lots of fun.Over the years I've owned derringers. In S. Calif., I carried a High Standard .22 mag derringer as a back-up gun. A few years ago, I traded it for a .38spl Remington type derringer. Bigger bullet, etc., but very inacurate and it hurt my hand to shoot it. I bought a pair of bicycle gloves with padded palms, which helped a lot. I got tired of that, and just recently traded it.
I found a Remington style Cobra .22 magnum a couple months ago at a reasonable price and bought it. I hafta say, this little jewel is a delight to shoot. It is the most accurate derringer I've ever shot, good to about 20+ feet, and very manageable recoil. It is quite small and altho I never use a derringer as a SD gun, I do slip it in my pocket from time-to-time as a back-up.
Fun to shoot. Handy to carry. Cowboy fantasy. Why not?