I've been following this thread with interest. I've watched a lot of the YouTube vids about the P17. One guy said that even after testing the improved version he preferred the Taurus TX-22. Yesterday, a guy next to me at the range had a new Ruger LCP II, in 22 LR. It burned through a bunch of CCI without a hic-up, even a bunch of rapid fire mag dumps. As soon as he switched to Winchester Super X the troubles started. Failing to fire, failure to extract. He gave me his "duds" and they popped off fine through my Henry rifle.
I'm looking forward to your range report on the P17.