I have had a similar experience with the jamming in my S&W Victory 22LR pistol. A lot of jams and mis-loads every few magazines on the range. I even reloaded the jammed and miss fed’s only to have them jam or misfire the same.

I think I would take mini-mags over stangers. 😇

Whoa, now I nearly went and wet the recliner! Oh well, won't be the first time. And before you re-smelt that Walther, you might give Mil-Com's TW 25B Extreme Performance Synthetic Grease a try. Comes in it's own plastic syringe with an extra long nose for those hard to reach places. Reminds me I had a wife once with an extra long nose but it didn't work out. Too many months at sea, and again she with that nose and those hard to reach places. Where was I; oh yeah, if you've not tried gun grease before I find it best to wipe out all traces of oil then squirt or rather lay several little inch worms along the slide before re-assembly. Just drawing back the slide you should notice a big difference. Feels like roller bearings. Hope this helps. If not, if you have a canoe and a small body of relatively still water, on a calm day that P22 can serve as a reasonably decent anchor. "You'll never wear out an Indian Scout or it's brother the Indian Chief, they're built like rocks to take hard knocks, it's them Harleys that give you the grief." "All the best"

Stingers were intended for an 18 inch rifle. The powder burns all the way to the end of the barrel or it doesn't work Yellow jackets were designed for a pistol fast burn powder.somebody needs a lesson in ballistics.