The ornamental design for an expandedbullet, as shown and described.
FIG. 1 is a perspective view showing the expanded bullet embodying the new design;
FIG. 2 is a front elevation view thereof;
FIG. 3 is a right side elevation view thereof;
FIG. 4 is a left side elevation view thereof;
FIG. 5 is a top plan view thereof; and,
FIG. 6 is a bottom plan view thereof.
The broken lines in the drawing views are included for the purpose of illustrating unclaimed environment only, and forms no part of the claimed design.