FIG. 1 is a perspective view from above and a left side of a firearm shell holder incorporating my new design;
FIG. 2 is a top plan view thereof;
FIG. 3 is a bottom plan view thereof;
FIG. 4 is a right side elevation view thereof;
FIG. 5 is a left side elevation view thereof;
FIG. 6 is a rear elevation view thereof; and,
FIG. 7 is a front side elevation view thereof.
The uniformly broken lines shown in the figures represent portions of the firearm shell holder that form no part of the claimed design. The dot-dashed broken lines shown immediately adjacent the shaded areas represent boundaries to the claimed design and form no part of the claimed design.