I bought a box of 100 9mm rounds made by winchester, their value pack. I was just loading rounds and shooting, and repeating the process a few times. I take my first shot, and my Keltec P11 jams. I have shot a few hundred rounds from this gun and haven't had one problem. I look at the shell, and the brass is crowned around the part where the bullet is seated. I can see what looks like gun power maybe?, stuck between the bullet and brass. The bullet also sits up higher than the rest, when in the box, which means the bullet isn't pushed in all the way. Is it possible that this round was overloaded? I found one more in the box just like it, luckily it jammed before i was able to pull the trigger. I went to winchesters website for ammo, but a contact us link or customer service number for the ammo is non-existent. Any thoughts or suggestions? Ill try to throw a picture up here of the problem.