OK - so I've got my new to me Dillon 650 up and running. Very nice! But I'm a little unsure as to how many case the auto case feeder can handle at once. The manual says the hopper can be half full, but that would be about what? 7-800 .38 spl cases? Mine wouldn't handle that - about 2-300 seemed to work fine, but any more and the clutch started slipping. Am I on the right track here?