I know very little about scope sighting in. If they don't work, I just keep shooting until something happens. Hard to believe a good Leupold scope would fail. That would sure upset the devil out of me. Its a shame the scope was not true. It would have been interesting to see what kind of group that BD shoots.
I am guessing this is the 22 inch barrel since you did not mention XR. I have always thought a 22 inch BD would be a perfect brush rifle. Easy to get around and deadly accurate.