Call Dillion and replace the little white nylon spear which controls the primer flow, you can see it in your picture, and flip the little oval tab on the front of the primer mechanism. Also I take off the low primer alert and drop the primers, it's a more direct flow. I was having a problem with a few Federal Match primers so I took off the knurled silver knob on top, and put a something in the tube to align the tube and with the opening of the knurled knob, problem fixed....