Shin Tao-
Go buy a nice single stage press, some Lee .44 Mag Dies, Winchester Large/Mag primers, Winchester 296 powder, and some Speer 240gr JSP and make your own!
Honestly, I bought the supplies to reload the .44 Magnum before I bought the gun because I knew it was too darn expensive to shoot factory stuff.
Oh, for fun shooting, try lighter cast lead bullets over Winchester 231 powder.