Originally Posted by the86d
Dillon Swager... Anything else is a waste of time, I used to drill the edges out, believe me the swager is better.
I was going through a bunch of Lyman reamers 1st.
China Harbor has a COUNTERSINK for $1.99 that fits a drill and apparently works decent but word was when I posted that you just gotta be careful, but hey! 3 seconds per shell...