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Instead of guns, why not regulate ammo?
(lemmy.dbzer0.com)
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You mean EDM wire cutting the rifling? You could technically angle the wire inside the barrel to achieve the proper pitch. But your pitch will be limited by the length of the barrel. Also is you angle a straight wire inside a tube and cut slots into it, the bottom surface of your slot will be parabolic. Not ideal for rifling since the pressure inside the barrel will steadily grow as the projectiles moves towards the middle of the barrel and then decrease past that. You got a video of somebody attempting that. I'd love to see that. Also EDM wire cutting at home is doable, but far from easy.
It's more like rough etching away
https://www.thefirearmblog.com/blog/2019/08/13/make-a-factory-quality-9mm-rifled-barrel-in-your-kitchen-using-salt-water-and-electricity-ecm/