Railgun Reaches World Record of 33 megajoules

[tblaxland]

Railgun Reaches World Record of 33 megajoules - Off-World Applications? (with Video)
http://www.spaceref.com/news/viewnews.html?id=1481

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

There is some nice high speed footage in there

I calculate 33 MJ = 8124 m/s dV for a 1 kg payload.