Here is a primer on railgun technology Using Electromagnetic fields projectiles will be almost six kilometers/second. The number of rounds fired per ship would jump from 232 to 5000. The destructive force those rounds deliver would more than double, from 6.6 megajoules to 17. The rounds would fly almost five times farther — up to 300 nautical miles.
More on electromagnetic railguns
General Atomics Aeronautical Systems has won a $9.6-million, 30-month contract for the preliminary design of an electromagnetic launcher. This weapon could be fielded between 2014-2019.

Brian Wang is a Futurist Thought Leader and a popular Science blogger with 1 million readers per month. His blog Nextbigfuture.com is ranked #1 Science News Blog. It covers many disruptive technology and trends including Space, Robotics, Artificial Intelligence, Medicine, Anti-aging Biotechnology, and Nanotechnology.
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