In Orange County there is a growing large segment of gun owners and CCW holders that are women. A 22 semi automatic appeals to many of them beacuse of the size, recoil and less than defeaning sound when firing. A typical compact 22 offers a slide that is also manageable. So it is not unusual that the smaller handgun finds favor as it is easily concealable also. I am not addressing this ongoing dispute about Failure to Fire of rimfire semiautomatics. The alternative is buying an 8 round 22 revolver and simply pull the trigger again if there is a misfire. But even that is not ideal. So in order to bring my wife into self defense, I purchased a Walther P22 CA in January 2021 based on all the above. The handgun is VERY different than the model sold outside of CA in two respects. First, the recoil spring in CA is the old version while everywhere else it is a captive spring. Perhaps that makes a difference in cycling ammo? (Note: you cannot modify the barrel for a suppressor-illegal here anyway). Also there is no key "lock"on the CA version of the gun, rather a bike type lock in the box. Otherwise, it is 10 rounds plus one. At Turner's Outdoor they provided me with 2 boxes of Aguila INTERCEPTOR ammo which is high velocity 40 grain round nose. I already had already obtained Federal 40 grain 1230 velocity 22LR at Big 5 (waited in line 2 hours) and that is what I fired at On Target for the CCW amendment. 40 rounds, center mass, no misfires and I cleaned the gun thoroughly. I would offer that the YouTube community has already shown that Aguila Interceptor HV rounds do NOT cause FTF. Numerous well done videos confirm that in this handgun. So for reliability I think the Walther WITH the HV rounds works for my wife. She can train on the Federal, defend with the Aguila. Just no CCI Mini Mag/Stinger available in the state which is the preferred round for self defense. Cleaning and oiling a 22 is required to keep malfunctions down. My 9mm Shield is doesn't care what ammo is used. Rimfire is just picky.