Very inefficient coilgun

Just a quick mock-up (because I cant really build something real) of a coilgun.

Yes I know its not really good, and probably could use a lot of improvement!

Made from a discarded one-time camera (charging circuit), a discarded pen and some old coils I had lying around.

Works on a 1.5 volt battery, charging a 80 uF capacitor to 250 volt, and then putting that into 2 coils of about 630 turns each of about #30 gauge wire, each of about 15 mH inductance and unknown magnetic coupling but pretty close, and about 16 resistive ohms each.

2.5 joules of energy in the cap. But the nails are too small and long, so not optimal. Thats the data, too tired (lame excuse) to do more maths now.