Well I've owned the C9, .40 and .45 Cal since July and August last year and finally got to the range. The .45 and C9 fired flawlessly. Only put about 3 mags throug them as was shooting with another fellow and we were constantly checking targets. The .40 Cal hung up on the last two rounds on 2 mags out of 3. WWB Ammo. Not sure what this was all about. Any thoughts? My friend had a new C9 and had trouble chambering the first round as the receiver slide would not go forward. Any thoughts here? Accuracy was acceptable at 15 and 25 yards. Did notice on the .45 cal Aguila (made in Mexico) ammo that it left a gray powder residue on the front of the muzzle. None of the others did. Fun day.