I with flyingrhino on this one. I spent many hours trying to make those Hornady bullet feed dies work. With some polishing and bending, I got them to feed coated lead bullets (Blue and Bayou) but when I would start running rounds through my machine, eventually a bullet would come through that had a tiny bump/bubble/glob and it would jam the Hornady bullet dropper. The best I could get with coated lead was maybe 20-30 rounds before it would jam. I switched to the Mr. Bullet Feeder (Double Alpha) droppers and wow what a difference. These MBF droppers will feed anything you throw at them. I ran 400 rounds through the MBF 9mm dropper last weekend without a hitch.
I made a Youtube video to show people how to adapt the Double Alpha bullet droppers to the Hornady bullet feeder. If you search on Youtube "hornady bullet feeder with mr bullet feeder dropper", you'll see the video uploaded by Sparky. I made the adapters out of PVC pipe.
By the way, another issue with the Hornady bullet droppers is they require what I believe to be excessive flaring of the brass. The flare numbers are published right in their users manual and it produces quite a bell mouth. The Double Alpha droppers will work with minimal flare which I think is better.