I have a rather odd question that delves outside of the realm of reality just a bit. Recently, I've had a bit of an obsession with designing ludicrous weapons. My current venture is a little bugger I call the 20MM Magnetic Accelerator Rotary Cannon. The MARC20 for short. It's an eight barreled minigun with a twist. Instead of the traditional gunpowder propellant, each barrel is instead a hollow electromagnet that should pull the bullet through the barrel at some velocity. Were this a single barreled weapon like a carbine or an assault rifle, there wouldn't be an issue here. But this is a minigun with eight barrels. It has rotation. So, how would a rotation affect a magnetic field pushing a projectile along a narrow tube? The desired RPM is 300,000(I did say they were ludicrous), and the barrels are activated with a pulse of electricity every time the barrel passes the top of the gun, where a pair of electrodes interact and send the pulse down the barrel(theoretically pulling the bullet with it). Thanks!