12 gauge EMP shells

 are a type of 12 Gauge shells that appeared exclusively in Fallout Tactics.

Shotgun EMP rounds are very effective against robotic enemies. Against personnel, however, EMP ammunition is entirely ineffective. Firing an EMP-loaded shotgun at a human or animal foe is nothing more than a waste of valuable ammunition. EMP shells do not become available until late in the game and tends to be somewhat more costly than most other forms of shotgun ammunition.

Locations

 * Trader Special Encounter, for sale.