When I set up my new pro1000 recently, I experienced the same thing that had been reported to me by several other users. The deprimed cases or finished cartridges don't fall off the chute, instead they bind, pile up and eventually one can get squished.
From my last visit on a large industry trade fare I got some sample of "igus tribo-tape". That's a thin sheet of plastic with very low friction coefficients, made to make things slip easily over a surface. But it can be mounted using standard two sided sticky tape. So I cut a piece in the correct size and shape and stuck it into the chute. See pictures for details.
Not a single case or cartridge ever did bind again, every single one slips off the chute like it was kicked down the chute.
The igus company usually does ship free samples on request, but it seems the product is not available in the US yet. I can try and order some sample material and send it over, if you like. I still got enough for one application here.
