Coilgun

So I'm designing and building a coilgun which uses electromagnetic energy to propel a projectile forward at a reasonable velocity.  A capacitor bank which stores energy is discharged through a solenoid which has been finely tuned for a specific ferromagnetic projectile.  The coil's magnetic field in theory has collapsed by the time the projectile enters the center of the coil and the projectile continues through the other end of the coil at some velocity.  I'll be updating pictures and maybe a few videos of the progress/project.