Needs to play more to make sure of this but I've had several of my friends using the BR complaining about how OP the DMR is. Personally I'm not sure but yeah it seems the BR loses more often than not to a DMR in face to face situations.
Like it take 5 shots of DMR to kill someone. Likewise it takes 5 Full shots of BR to kill someone. The thing it's that it's easier to land 5 DMR single shots than 5 perfect BR shots. I don't understand why they wouldn't make it the infamous
"4 shots" it used to be. That was the whole point of the BR.