Apparently this can be done by fiat in Washington State, and has been. I understand framing an issue, and traditional ammunition sounds a lot more like mom and apple pie than lead ammunition, but I’ve always hated using terms that basically try to throw some sheets over the elephant in the room.
Lead’s been what ammunition has been made out of since we’ve had firearms, so in that sense it’s traditional. But everyone knows the issue is the lead, and there’s probably not going to be much papering over that.