It is my understanding that there are two different versions of the 357-44 B&D which differ from each other in the shoulder angle. Supposedly at some point in its history the angle was changed to alliviate set back problems. Problem is, I don't know what the two angles are, nor if my dies and chambers match on this point.
As for the loads, we ran some loaded cartridges into the sizing die a second time and then they chambered OK. I suspect problems with neck clearance.
I have been thinking about chambering a Black Hawk for this cartridge as well.