How do you clean the internals of the brake properly? I think it has an expansion chamber inside there and that would be nearly impossible to reach with any sort of real cleaning implement to knock out powder residue. If that stuff builds up on the end of the barrel at all, it could affect accuracy somewhat.
I have also heard that Bushy has problems with bolt/carrier tolerence in their firearms. A friend bought one a while back and the bolt/carrier would not work correctly in either AR that he had and one of them was quite old and very worn. Is this a common occurrence?
BTW He traded the bushy off for something else, so it is someone else's problem.