Has there ever been an attempt made to design a bullet with moving parts? I'm not talking about an RPG or anything like that. I'm talking about common calibers like 9mm, .45acp, .223 or .308 but maybe the bullet has a hollow cavity that conceals fins/razors/points/etc. to make it more efficient. Maybe once in flight the centrifical force caused by the bullet's rotation causes the moving parts/appendages to deploy and make it more efficient. Is that something best left to Hollywood or has it actually been tried? Thanks! -Emt1581 Wanna kill these ads? We can help!