I made an electromagnet gun for a tenth grade physics project (1975/76). It fired at 75fps. I timed the successive magnets with a falling weighted switch. It could hit a paper plate at fifty feet with steel BBs. They had a great used parts stockpile at that school. I was using parts from pre ww2 radios etc. Lots of brass, wood, and Bakelite. I could slide the magnets up and down the barrel, and the contacts around the switch stator. I spend days fine tuning the timing.
Nerdiest thing I ever did.
—”a falling weighted switch. “
Totally cool!
Guessing that might limit your muzzle velocity, there would be a limit on how close the switches could be and the spread of the magnets...
You did it.
Totally cool!