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Re:New Warship’s Big Guns Have No Bullets by roryisok on Tuesday November 08, 2016 @05:45AM (#12899170)
and I bet they don't cost $800,000 each
Re:New Warship’s Big Guns Have No Bullets by Animats on Tuesday November 08, 2016 @12:52PM (#12902372)
Here's the Navy's railgun.[1] Each projectile costs $25,000. Not clear why it costs that much.

[1] https://www.youtube.com/watch?v=GXF0n6aojSc