Now that I am using a Thompson Coil with my 15KJ 8000v 460mfd capacitor the pulse legnth would be exadurating the correct need for a 1 gram projectile. That mean's I can use a much larger projectile, upto 100gram's would be able to be accelerated without the pulse legnth being too short for full acceleration. I am using a 10gram, machined alluminum disk, below are a few pictures.