Ultritium concussion shell

The ultritium concussion shell was an ultritium based artillery weapon used during the 24th century by various military powers including the Dominion. The ultritium shell was the most common artillery weapon used by Alpha Quadrant civilizations. 

The Jem'Hadar used ultritium concussion shells as an intimidation tactic against a small Starfleet team that had taken possession of a crashed Jem'Hadar attack ship on Torga IV in 2373. Due to the ship containing a Founder the Jem'Hadar did not strike the ship with the shells. 

During the Raid on Coridan the Dominion forces bombarded the surface of Coridan with ultritium shells causing significant damage to the mining infrastructure on the planet.