There is an aftermarket (can't remember who makes it right off, but I'll look it up) piece that funnels them into the cup better. I just sweep up afterwards, but I agree it's an unusual oversight on the part of Team Blue.

http://www.ebay.com/itm/Dillon-XL-65...-/281094732312

It was something like this. There are several versions, and for other Dillon upgrades check a company called Uniquetek.