The shot took place on December 10. From the US Navy’s YouTube channel:

The Office of Naval Research Electromagnetic Railgun located at the Naval Surface Warfare Center Dahlgren Division, fired a world-record setting 33 mega-joule shot, breaking the previous record established Jan. 31, 2008.

Target effects footage, almost certain to be classified, is conspicuously absent.

Video of the previous record-holding shot, which was reportedly “over 10” MJ is here. Per Popular Mechanics, the Navy is reportedly working towards a 64 MJ device for deployment. [via Neatorama]