My c9 nosedives and jams the first round when the magazine is filled to the max and I rack it by hand. Thinking it was the magazine I carefully applied all the "fixes" to the original 8 round magazine. No change. So I bought a 10 round magazine direct from MOM and didn't touch it. Same thing. Today at the range I found that with an additional round in the chamber (10+1) it would fire the first round out of the magazine after the one in the chamber and every round thereafter without a jam. It appears that something I do to manually feed the first round out of a full magazine causes it to jam every time but it "cycles" fine. I try to load the magazine correctly, angle of the rounds, each round touching the back of the magazine, etc. It now appears to be "operator error" but if I don't load the magazine all the way, it works fine. Am I racking it too slowly/gingerly? Any thoughts?