Tisaku
Head Chief Thinkomancer
-SCIENCE!! begs to differ. Granted this one isn't all that powerful, but a guy made it in his garage, probably in a couple of days.-No? A coil gun is a series of coils, each of which provides a pulse. There's no constant force at all.
Unless you're gonna make a single giant coil(which is inefficient), you're going to have the projectile "wobbling" up and down as it enters and exits coils. You could stick the entire thing in a coil pointed up, but why would you do that?