Pac-Nor barrels were excellent, but their special claim to fame was their ability to make barrels in odd bore sizes like .318 or .425 Westley Richards, 7.35 Carcano, etc.
Making rifling heads is tedious and expensive, and I expect they'll try to concentrate on the most popular bore sizes to get profitable as soon as possible, so I don't think I'll find a victim for my Westley Richards reamer for a while...