Q&A for How to Make a Coilgun

You can wire multiple capacitors in the circuit if you want the gun to shoot faster and further.

With that capacitor, not very. This isn't a weapon. It is more like a school project.

Any capacitor should work. Bear in mind that if you get a capacitor that has a higher charge content, it will be more powerful.

You should go for enameled wire for efficiency reasons. There are materials to avoid. You are looking for wire with a low resistivity to reduce the amount of heat created.