Hodgdon seems to skirt the question by using Winchester primers.

W231 was cleaner and considerably less smoky at this level, but they weren't as accurate, grouping about 2" above the point of aim at 10 yards.

(This is my second attempt to download .44's, but the difficulty I have is that my pistols are prisoners of the range. So unless a bear gets a hold of a key card to the range door, I don't need any fire breathers.)