Well, I took it out to the range for testing this evening, after polishing the feed ramp. First forty rounds went through just fine, then I started experiencing a consistent FTF on either the seventh or eighth round per magazine, where the round gets stuck pointed almost straight up. I believe I remember reading where this is due to the mag lips not being tight enough. Please confirm. ALSO...and a bit more disconcerting is that about 75% of the time my slide does not lock back after the last round. This has been consistent both times at the range. Are there any adjustments I can make or should I just call HP? Thanks!