outdoorsmen
My knee jerk reaction is probably it will not work. When Big 6x6 tried to shoot it with a FPJ breech plug it would not go off consitently at all. The new Buckhorn is a progressive powder much like a centerfire powder and it requires compression to continue to burn. The FPJ breech plugs probably let to much back pressure back out of the breech plug to sustain a progressive burn. 6x6 even tried getting it going with the hot federal primers - not much luck there either. He was succesful getting to burn with a NFPJ breech plug...
I am really hoping that the NFPJ will be consitent enough to allow the use of BH-209. Although their most recent information says that it has to have a close BP system such as the Omega-KRB and etc...