Coilgun or Railgun?
P.S. I've found places on the internet that give tutorials on making capacitors, which I would also consider doing. If I'm able to make large-capacity capacitors myself and use those, should I build something other than what I should make if I only have access to camera flash capacitors?
P.P.S. I heard the following rule somewhere here on this site: "The more amps in a coil, the more powerful its magnetic field, the more voltage in a coil, the larger the magnetic field." Is this true?