I have a S&W Walther PPK that is popular during training classes. Never had a single problem. New shooters like shooting it more than I do. It went in for the recall during the peak, so it was gone a while but it too came back feed ramp polished.
I had an Interarms PPK/S in 90's. I will never own another one. Worst trigger on a DA I have ever had. Wouldn't feed hollow points at all (HydraShok or SilverTip at that time).
First thing I did with my new one was run HydraShok through to see if they ran.