I have one built on the BBK-02, action acquired about 1990 from Bauska Arms of Kalispell, Montana, which was the predecessor to the current BBK-01 (Olympic Arms of WA?), oddly enough, numerologically. If some one can explain this sequence, I would appreciate it. I think they are the same actions, made in South Korea. Mine is a .470 Mbogo. It used to be a .460 Wby. Maybe the BBK-02 is a more finished/polished version of the BBK-01, which can be rough as a corn cob, I have heard.

I haven't used one but know folks who have. Come rough, need lots of polishing and finish work, but clean up pretty nicely. A derivative of the Brno (CZ) ZKK-602. Have many desirable Mauser & custom features, relatively inexpensive ($544):