Mark Stouse, the "old" owner of Blackstar, who I "think" ended up having it again at the bitter end, always used to maintain that special reamers were not neeeded, but that particular machining practices (rpm, feed rate etc...) were. The CEO of Lothar has always maintained the same (and he's a pretty sharp tack in my opinion). My riflesmith says that Blackstar barrels are no more difficult to chamber using "regular" reamers than any other make of barrel, as long as the instructions (which used to come with them) are followed.
I wouldn't and am not suggesting to get one, but I do know a couple regular BR competitors who tried them (and had them chambered by the same guy I use - with regular PPG and Henrickson reamers) and reported them to be just as good as any other custom make. But no better. There are some very good reasons aside from the quality for not using one at this time though, and I wouldn't.
- DAA