Ben Amonette, tech at ATK has personally confirmed for me that the factory loads all the .327 Federal ammo with CCI small rifle non-magnum primers. This is a 45k PSI max round and the rifle primer is called for to contain that pressure, so that's the primer you will want to use.
Nice little collection. And I agree that the Blackhawk is bound to be a strong platform, but I can't see it being any stronger than the GP-100 because the GP is a 7-shot and the B'Hawk has 8 holes bored through that .44 Mag sized cylinder. (you want TOUGH? My .30 Carb B'Hawk has the same sized cylinder your .327 B'Hawk has, but with only 6 holes in it. The meat between chambers is substantial)
Another option for a pretty stout .327 revolver? Freedom Arms makes a nice one that's probably not a wimp.
Attention Brass rats and other reloaders: I really need .327 Federal Magnum brass, no lot size too small. Tell me what caliber you need and I'll see what I have to swap. PM me and we'll discuss.