After Shaving down the head of the bolt to make it travel through the stainless steel tube, it weighed in at 148.8g WoW! I was a little worried I was going to big but what the hell.

Ok, so I obviously wasn't thinking it through with the wiring of the trigger. FAIL. But it was just a dirty little setup to see if the projectile would even fire. It does pretty well too :) You may notice a few things here. One - I had a nice little blast shield in place in case the make shift setup proved its high likelihood of blowing up. and Two - the coil ripped off the back end of the tube! I still had a good deal of forward momentum on the projectile though.

After this initial setup with all its ugly wires. I added some screws in front and behind the coil to hold it in place. I also placed an old dead battery on the platform to help hold it in place. I used a small Li-Ion battery pack (11.1v) to power the trigger this time. After reattaching the coil, the second shot is below.

Curiously, there was enough of a back spike that the battery pack started to overheat. Hot enough that I put it in a SS container and put it outside. It never burst into flames though :( You probably noticed that the coil still shot backwards. So there is much more speed to harness here :)

It appears to have arced from the coil to the nail during the second shot. As I said before I butchered the coils pretty badly when I was attempting to free the second lead initially. So, I will need to re-enamel some of the line and probably soak it in epoxy to hold the wire in place. But overall this feels like it has some good Umph packed in it. Now I just need to stop making these half assed setups and put together a little bit higher quality one. I need to look into the IR sensor setup as well. Until next time :)