Just recently started toying around with this idea. and was looking for some good input from anyone more experienced in this area. I am currently working on a much smaller railgun but I plan on working on this larger one. I am working with some others on this project I am more of the builder/ designer a few questions i wanted to ask were. If I were to fashion a ceramic barrel(trying to reduce corrosion to the rails) with rifling would that impeed on the lorentz force for the projectile. could any current lithium ion laptop batteries power such a device if enough were gathered. leaving this as an open discussion I will be posting my results on youtube after the first prototype is complete.