Mythbusters
Episode 10: Explosive Decompression, Frog Giggin', Rear Axle
".22 caliber bullet as a automobile fuse. As the story kind of goes, some people were returning on a trip and shorted a fuse. They used a bullet as a fuse and continued driving. Later on, the bullet suddenly fired and hit the driver in a sensitive area."
What I gathered from watching that episode was that electrical current can in fact pass over the metal surface of a bullet without detonating it. In this episode they had to significantly rig the trucks electrical system (to absurd proportions) to such a degree that they burned out the wiring, the resulting
HEAT that that much current created was able to fire the round. Burning out everything in the process.
To my knowledge a Tazer fires a repeating AC impulse and does not generate that kind of heat. So no it will not fire your gun
