I have a slightly intelligent question.
How would 44mag brass fire from a revolver, bulge at the mouth?
It could only bulge as big as the cylinder, correct?
And being the size of the cylinder, would still size ok.
Could the op be inadvertently firing them out of a .45LC revolver or Taurus judge (or similar gun)
Edit: I just realized you don't seem to be a newbie to reloading. Would still lie to know how brass in a revolver could expand beyond the size of a cylinder.