The ornamental design for a wad for a shotgunshell, as shown and described.
FIG. 1 is an exploded perspective view of a wad for a shotgun shell, showing my new design, which is shaped to receive the unclaimed projectile shown in broken lines;
FIG. 2 is a perspective view thereof, with the wad for a shotgun shell in assembled configuration;
FIG. 3 is an exploded perspective view thereof;
FIG. 4 is a perspective view thereof;
FIG. 5 is a side elevation view thereof; and,
FIG. 6 is a section cut view taken along the line VI-VI′.
The broken line in the drawings depicts unclaimed environment only and forms no part of the claimed design.