I don't load much 9mm, but the finished rounds tended to hang up on the ejector wire, being wedged between the ejector wire and the far side of the case slot. I virtually eliminated the problem by rounding the corner where the circumference of the shellplate meets the side of each cartridge slot across from the ejector wire. After removing this material the cases hardly ever catch.
I used a small stone in the Dremel and was careful not to remove any metal which is above the case rim when the case is fully inserted in the slot (therefore not lessening the surface area of the shell plate which extracts the case from the sizing die or powder funnel).