A railgun uses electromagnets instead of explosions to propel a bullet (mini-missile, really, though not explosive). They can get up to several times the speed of sound, so that's quite effective. A highly aero-dynamic bullet went four miles at ground level after having punched through a 1/8" steel plate.
It'll be interesting to see what civilian spin-offs come from this in the future, usually there are some. Surely such power can be used constructively.