I'd been curious to try out my new C9 but hadn't had the chance. These past few weeks I finally got a chance and something strange has been happening. Sometimes the gun only works if I only load 4 rounds into the magazine. If I load 6 or more the gun nosedives or doible feeds nearly every other round. However, other times I can shoot strings of fully loaded mags without a hitch. Funny thing is the 3 magazines that I've shoot full of hollow points have also gone without a hitch. So I'm kind of curious because I've taken it with me about 6 times over these oast few weeks and sometimes it works flawless while the next day it jams every other round and the next it works flawlessly. Sometimes, on the same day, it works flawlessly and then jams suddenly and doesn't fix itself, or vice versa. Anyone having similar issues?