These are good brushes, but I think they're worth about half the selling price given that they only do a top notch job for about 100 passes through the barrel before they get sloppy in the bore.
Pros: Brass core with bronze bristles is a real plus
Cons: Only got 100 good contact passes through barrel; then it had too little resistance
This review was written in the old system and had content requirements that are different than reviews written today.