I had one. One of the only guns I've ever sold. You had to cut down and fire form .30-06 brass before reloading it.I have always admired the .44 Auto Mag....
Factory brass wasn't available at the time. It was hugely popular and desirable though and I got about 2 months pay when I sold it.
Hated shooting it because you spent a lot of time on your knees looking for spent brass.