Hard to find a Firestorm 22 in my neck of the woods. Where are they most prevalent? I imagine a lot to do with the type of ammunitions may be in the recoil spring of the pistol. When (if) I get one I'll order another spring and experiment with what works with ALL ammo. Most of the time, pistols, and especially blowback 22 LR pistols are adverse to anything cheap or anemic. A Federal pack may be a great plinker, but if you ever hear one or a few of the rounds sounding "lighter" in sound than the others, and in a rifle it may or may not cycle right, it is a problem with pistols that rely on enough consistent pressure to cycle the action. It is also one of the problems of the SIG Mosquito. Ruger auto-loaders, seem to have worked better in this regard due to that barrel being solid and the internal bolt sliding back and forth on a rail and compression recoil spring. Rugers don't care so much if it's a hard jolt back as it is the SS bolt moving, but it is enough forward pressure with the spring to strip and load a fresh round. I hope I haven't confused anyone, but the idea of the Bersa and others handling all the different ammos might center around the amount of energy to compress the main recoil spring to cycle reliably.
