I was also thinking of the failures to fire..Could the bullets have been a bit large in the leade of the bbl holding them back slightly cushioning the firing pin blow just enough? I had that happen one time many moons ago with a 9mm semi auto and some reloads I had made up with lead bullets. Don't even remember what gun it was...may have been a P1/P38. Long time ago...no thinking back it was a S&W 39. Being as the 9 is not my favorite I only have 4 now..a 639 Springfield 1911 my wife's Kahr and a Ruger convertible 357/ 9mm. They all use Fed HS 147 gr except the Ruger and it is a very good load for defense if you have to use the 9mm. My wife does carry the Kahr