Why is the rail gun an interesting weapon?

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Drakkith
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Would it be possible/practical to start the projectile with explosives (maybe a shaped charge), and then continue the acceleration with the "rails"?
I wouldn't have believed it, but yes. From here: http://en.wikipedia.org/wiki/Railgun

In some hypervelocity research projects, projectiles are "pre-injected" into railguns, to avoid the need for a standing start, and both two-stage light-gas guns and conventional powder guns have been used for this role.
 
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I wonder if multiple explosions could be used, and if they could be done in a way to give spin to the projectile (rifling). Maybe if they get crazy enough they could combine railguns and nuclear blasts. Example: have a long vertical/semi-vertical tunnel going underground, then have the nuke at the very bottom, and the railgun built into the wall... Though the projectile would have to have a very high heat resistance, as for shape; use a conical shaped charge design. If you really want to go the extra mile; find a way to create a concentrated beam of radiation, that would heat the atmosphere inline with the ballistic flight path for temporary dispersion. (create a partial vacuum for the projectile to fly in).

~just a thought
 
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