These figures arent extrapolated (but I have put more rounds than this. Once this occurs, the pistol will no longer function reliably. As I am a data scientist at heart, I decided to record problems with my new P22. What ends up happening is that the firing pin isn't moved far enough back past the safety block for the hammer to strike it. This causes the small spring that's tasked with returning the firing pin to become hyper-extended, thereby impeding its ability to fully return the pin. I found a thread on another forum about Walther P22 feed problems, but I cant find it now. When a P22 is dry fired, there's no casing in the chamber to stop the firing pin and the pin continues on into the empty chamber cavity. I pulled it apart and cleaned it and it made it worse. After the firing pin impacts a chambered, it's returned to position by a little spring that sits inside the breach block. Yes, if I chamber a round, manually, and then manually pull back the slide, the round stays in battery. When a the trigger is pulled and the hammer falls, it strikes the little bit of the firing pin protruding through the safety block and sends it forward to impact the chambered round. However FTEs and other jams while firing are common enough on a new P22, and I believe a break in period of high velocity ammo is recommended to resolve those issues. When the safety is disengaged, there is about a tenth of an inch of the firing pin protruding. Only small portion of the firing pin protrudes from the back of the breach block and through the safety block. The firing pin has a nub that keeps it from falling out of the breach block, and it's held in position by a tiny spring. The Walther P22's firing pin is a flat piece of metal that moves freely in the center of the breach block.
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