It seems to me like the Dreg's Promise shots don't register correctly when they hit an enemy. And, while I do run into a ton of games that are unbelievably laggy, I've noticed that even during games when there doesn't seem to be much lag, the rounds still just don't seem to register hits consistently.
Sometimes, the hits register late, and I get a post mortem kill. Sometimes I survive, but it's a very close call, because my enemy's death is very delayed. But, sometimes it's like I was shooting dummy rounds.
It's really weird. I'm not sure what's going on with it. Hopefully Bungie is aware of the issue and will fix it soon, because I think it's a neat gun and could be bad@ss, if it worked right.
-
You could be noticing the slow travel time of the bullets, causing a slight delay between firing and impact. Otherwise, there could be connection issues.