What is the theoretical max velocity for a gunpowder fired bullet that we use today in all guns and artillery? What is the MAIN limiting/deciding factor? I'm guessing it would be the gunpowder burn speed/pressure increase right? Now what about theoretical max velocity for electrochemical guns? Using electricity to produce plasma/pressure to propel the bullet... I had a crazy idea for a electrochemical accelerator but wasn't sure if it was worth pursuing... Thanks for any input guys.