500
I reload the .500 S&W. Dies are not expensive, nor a basic press.
When you consider that a box of 20 factory loaded rounds will cost anywhere from $40 to $60+, loading your own becomes very attractive. It surely does not cost two dollars or more per shot (provided that you have the brass)
And you can load some pretty exotic, powerful stuff - ammo that you cannot buy. My favorite is a 600 grain Rick Gibson bullet at 1300 fps. A real thumper.
Pete