The Hornady 366 Auto Progressive Shotshell Press is a great press for reloaders looking for a great progressive press for shotshell reloading. This is the same great tool that was included with the press and is ideal to speed up the reloading process and end the daunting task of manually inserting primers into the feed tube. The tube filler holds a full box of shotshell primers and fills the tube with a turn of the dial. Notes: Holds a full box of shotshell primers and fills the primer tube with a turn of the dialWill not allow inverted primers into the tube