Well, after several more range sessions with various types of ammo, I sent it back the manufacturer because it wouldn't run 100%. Got it back and still had the same problem and then the trigger bar broke. Sent it in again. When I got it back, I decided to cut my losses and traded it for a slightly used Kahr CW40 that a local shop had.
Bottom line, I think the DB is just too small for 9mm. There's not enough material there to allow it to handle a variety of ammo. I think its a good concept, but for a carry gun, I want reliability.