Like startup52 and brannockburn I have used .22 Stingers for years with no problems in four semi-auto rifles (Marlin 60, Remington 66, CBC 7022, AR-7 Explorer) and two pistols (Ruger MkII and Jennings J22). Mostly in the Marlin 60 and AR7.
I discontinued use in the Ruger MkII 6" barrel because the factory says the recoil velocity of the bolt is too sharp with Stingers.
On the other hand, with the 2" barreled J22 the Stinger is the best for reliable function and recommended by the factory.
Accuracy in the Charter Arms AR7 Explorer II pistol 8" barrel was very disapponting with the Stinger, but no other problems relatetd to ammo.
I suppose it would have been more helpful if I had kept a range book on date of purchase of ammo with notes on performance, in case others were having problems with different production lots.