No, the BR is a 0.473" casehead, same as the parent .308, which traces it's roots to the 7X57 mauser. The PPC is based on the 220 Russian, which is based on the 7.62X39 which uses a .445" case head.

Shouldn't be too hard find a 6ppc take off barrel, should be a dandy deer round with 85's. Though you'd likely have the barrel will need to be contoured to drop some weight.