Yeah I used to know what that was like. 550 hours and not once did I see it drop for but maybe one or two people I played with. I ran the nightfall's yesterday on my titan, Hunter, and warlock. My rewards were a crappy shotty with my warlock, the vs Gjallarhorn on my Hunter, and the dance machines on my titan. I've never gotten that kind of luck. Although if it makes you feel better it was 15-20 runs of Crota before I got weapon drops. I'm still missing the rocket launcher and fusion rifle. Instead I've gotten 5 black hammers :-(