yes b'cuz every pirate is a devil fruit eater (sarcasm intended), to gain an adv over a few pirates u waste precious resources on idiots..look at the monster trio, only one has a devil fruit. plus there are devil fruit eaters with the navy as well so it works both waysanyone will doge them if they know about it that bullets are made of seastones, but what if they dont know, they will act like normal circumstances and get ambushed.this trick will make even normal soldier dangerous for df users.they will have to carefull with pistels in future. xd
i wonder why the us military aren't using diamond bullets