Source : Webster's Revised Unabridged Dictionary (1913)

Case shot \Case" shot`\ (Mil.)
   A collection of small projectiles, inclosed in a case or
   canister.

   Note: In the United States a case shot is a thin spherical or
         oblong cast-iron shell containing musket balls and a
         bursting charge, with a time fuse; -- called in Europe
         shrapnel. In Europe the term case shot is applied to
         what in the United States is called canister.
         --Wilhelm.

Source : WordNet®

case shot
     n : a metallic cylinder packed with shot and used as ammunition
         in a firearm [syn: {canister}, {canister shot}]