I recently purchased a 14.5" Bravo Co CHF barreled upper (or BFH in Bravo Co terms) and it's very accurate and an all around great shooter. I've shot a few DD rifles but never accuracy tested them so I can't compare in those terms.
The BCM is more accurate than both of my SR15's. It's also more accurate than most other chf barrels I own or have owned. Keep in mind though, I rarely shoot for tight groups. Even when shooting at longer distances, I'm more concerned about specific hits than I am the group itself.
Here's the first time I shot my BCM past 25 yards and also the first time I shot for accuracy. I wrote 100 yards but it was actually closer to 85. This was with xm193.
http://i1197.photobucket.com/albums/...C/9b218146.jpg