I think it is a strong possibility that she WAS hit before the last 4 shots ... whether it was with the parabellum or the air rifle or both. If she was hit with the parabellum in the first round of shots, then I am guessing it might have been in the arm and downstairs close to the pillar, where there is a considerable amount of blood. Speculating further, I say the arm because the arm wound is Said to be "near amputation like". Could that sort of wound be caused by a single shot? I do not know.
Without viewing all of the post mortem photos, the autopsy report, and hearing Dr. Saaymen's testimony, and the full ballistics and blood spatter reports (which we are not privy to) it is pure speculation at this point.
That said, from the few post mortem photos of the wounds, I am absolutely convinced that some of the smaller wounds that we have seen of her back, are air rifle pellet wounds. You can have my first born if I am wrong on that