more holy smoke batman … from the register
http://www.theregister.co.uk/2008/01/30/railgun_record_bid_us_navy_electric_hypersonic_cannon/
The US Navy will astound the world tomorrow by test-firing a radical new weapon system at an unprecedented power level. The new piece of war-tech on trial is that old sci-fi favourite, an electromagnetic railgun.
…
The designers hope in future to get the technology up to 64 megajoule muzzle-energy levels, able to shoot hypervelocity projectiles at a blistering Mach 7 and strike targets two hundred miles away – still going at Mach 5 – with pinpoint precision.