I am almost certain that I read about a US navy prototype railgun/coilgun which was able to accelerate a 2.7 kg mass up to a speed of 80 km( 50 mi) per second. That would do some damage.
[spoiler]I could've misread the 50 miles, which may be 50 km or 30 miles per second[/spoiler]
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Sorry buddy, but us navy prototype rail guns can't even reach 3000 m/s.