I'm in agreement with Dale64 and OCCI.
The only stovepipe jams I've gotten on my handguns were from either limp-wristing it or from ammo known to be under-velocity for the handgun.
My Walther P22 definitely prefers high-velocity .22LR rounds and it says so in the manual. The GSG-22 demands the high velocity rounds.
With the Walther I can get away with some standard velocity rounds if I am absolutely rigid with my grip during shooting. A friend of mine new to shooting had trouble even shooting some high-velocity rounds. I could reload with the same ammo and have 100% reliability, but hand it back to them and see 80% reliability. It was completely based on grip. After some coaching, my friend had 100% reliability as well. When using the CCI Mini-Mag rounds it was 100% reliable no matter what(as expected because of the higher pressure/velocity/kickback).
The GSG-22 was even pickier, and it also said so in the manual that this would be the case. Ammo selection has been the biggest "limitation" I've encountered.
Not that I'm an expert, but it helps to do your research, know your gun, check your technique, test different ammo, make sure it's a clean gun, check for deformities on the spent brass, check for deformities on rounds that feed but have not been fired, then check with your gunsmith if you suspect problems or cannot identify the problem.