You clearly know more than I do so I will leave you to it.
I am asking you to give some accurate chronograph data on the old 44 Mag ammo. You made the statement about it. Now I am not talking about some old ammo that has been in quesrionable storage where the powder could have broken down etc.. How simple is that.
The information I gave on SAAMI specs and how the pressure guns are referenced is easy to do.
SAAMI has a website.