Second strike ability is WAY overated.
Anytime the pistol FTF, it should be an immediate tap-rack-bang, continuing to pull the trigger on a dud round (or an empty chamber) is not likely to help you out in a bad situation.
.....
Now to answer your question:
Hard primers and or dud rounds can choke any pistol, I wouldn't give up on the P99QA unless it was a recurring problem, and it was happening with commercial ammunition, such as CCI or Winchester.
Anytime the pistol FTF, it should be an immediate tap-rack-bang, continuing to pull the trigger on a dud round (or an empty chamber) is not likely to help you out in a bad situation.
.....
Now to answer your question:
Hard primers and or dud rounds can choke any pistol, I wouldn't give up on the P99QA unless it was a recurring problem, and it was happening with commercial ammunition, such as CCI or Winchester.