I am planning to conduct an academic experiment involving an electromagnetic projectile. I originally planned to build a rail gun powered by a 400V 2200µF capacitor, I've read a lot of discussions that say rail guns require a tremendous amount of current. Is this capacitor sufficient to propel a 5 mm ball bearing weighing in at 0.5g? I am not expecting to break the sound barrier, just enough to notice an acceleration; of course the projectile will have an initial velocity not to weld the projectile to the rails. I've had doubts because of this and am thinking about a Gauss or coil gun as it typically requires less current. I have a bench power supply capable of 30V 6A or 60V 3A. Assuming the initiation and termination of the current in the coil gun is timed perfectly, will the rail gun or coil gun accelerate the projectile to a greater velocity?