Last resort:
Make tapered cavity in a piece of 1.5" dia CRS that matches the nose taper on the chuck. Clamp this to the chuch in a large vise, with parallels on the back of the chuck to clear the arbor, with a little room for the arbor to move until the back of the vise arrests it's imminent flight.
Machine tapered hole in side of CRS to accept .40 S&W round with bullet removed....... some key details left to your imagination....