Joe, my friend. Don’t fight it. When was the last time you saw any of these gun and ammunition laws that made sense. No gun law ever passed in the USA can be proved to have reduced crime, gun accidents, or anything else, except occasionally the pocket books of innocent gun owners. Of course it makes no sense to mark cartridges like that. I guess they figure that you can read those (usually) poor stampings, but can’t read the box label.
Gun and ammunition laws are invariably prompted and passed by people who don’t know a thing about gun laws, don’t have one iota of understanding about the real causes of crime and accidents (teaching youngsters that they should never touch a gun so that when they grow up, the have no clue about safely handling one should the have to or decide they want to), and have little or no common sense about anything at all, especially questions of gun regulations and ownership.