I bought mine used about 2+ years ago. The guy didn't use it because he couldn't get it to function properly. I got it and dies and a bunch of other stuff for a great deal. Brought it home and start experimenting.. and sure enough, was having issue with the primer seating. Watched the videos, took it apart and took my time putting back together.. I figured out his issue.. he put the primer "pin" upside down!!
That was over 2 years ago and 5,000+ rounds of mostly 9mm.. some 40 & 10mm! The timing is critical!!! Watch this video and set your timing like they tell you and I've never had any issues.
https://www.youtube.com/watch?v=D8tf...sJQZQ&index=34
Feel free to PM me any questions!!