I was able run two 'happy sticks' worth of 9mm through my Gen II this evening. One stick was filled with 115 gr. Winchester White Box, the other was filled with 124 gr. American Eagle. I am happy to report nothing but good news, NO failures, NO problems, NO issues, just flawless fun This is especially satisfying for me, considering that I rebuilt the rifle this morning with new grips, springs, trigger & a heavy bolt. Iron sights, rapid fire double taps into a fist sized cluster @ 25 yards Now to get that AAC Ti-RANT .45 I've had my eye on... .