Second time I've had to send in my Walther P22 for warranty repair. The first time around, last year, was shortly after I had purchased it and it was failing to extract. Sent it in for a warranty repair and the gun repair techs at Walther were extremely helpful in taking care of the return and repair. When it came back it was in fine working order, however, after putting no more than 250 rounds (or less) through it, I again encountered issues, this time not only failure to extract but also failure to fire.
For the video I ran 3 types of ammo through it. CCI Mini Mag, CCI SGB and Blazer 22LR.
They have again been polite and helpful with initiating the return for warranty repair. I'll report back when I have received the firearm and let you know how it turned out.