I had lee dies that I used in a turret press, but when I ordered my 650 I decided to try the Dillon dies. I found that the fl sizing die sized the casings to tight, so when I seated my bullets I could see the exact outline of the bullet in the casing. I went back to the lee die and didn't have the issue anymore. Some might say lee dies are horrible but after about 7k rounds I've never had an issue with them.