In doing research it seems that CVA doesn't make the QR breech plug for the older Optima rifles. The breech plug that requires a wrench to remove it. So can you shoot bh209 in these older model Optima's?
It might be hard to ignite. Western powders makes a breech plug but don't know if it will fit that optimal. Call Carlos at Eds Gun Shop in Vass, NC. If a breech plug exists he will know about it. If it doesn't he will be able to tell you how or if to shoot blackhorn.
CVA will know, tried to get a new bead for my SX2 at Eds and he could not find one and said they did not make them,??? Got a snap on bead from Wal mart and works excellent. Try CVA first they will know what will fit .