I won a Kel-Tec PMR30 at my local FNRA banquet back in September.
For those unfamiliar, the PMR30 is a semi-auto .22wmr with 30 round magazines.
Can't get much more fun than that.
.22 WMR kinda' fell into the shadows when the .17 HMR came along but one or two of them make the trip to SD with us every year. The 30 VMax devastates prairie dogs out to 100 yards,
22's with interchangeable cylinders are great. Use the 22 lr for plinking and change to the 22mag for bigger boogers. If it was all I had I wouldn't feel bad using it for self defense.