Seriously, though, think about this:
Sure, its great as a novelty item. Heck, its on my Christmas list! And it would probably work splendidly as a self defense ammo.
But would you REALLY want to be on the stand as a defendant in a homicide case, trying to justify Zombie Max as your self defense ammo if choice? That, in itself, would be the stuff of nightmares. A prosecutor would have a field day with you, tearing down your image as a responsible, sensible, gun owner. Plus, good luck finding a law enforcemwnt agency that equips its officers with the same ammo to cite as a basis for your choice.
Hate to be the untra-sensible party pooper, but although you may find Zombie Max proudly displayed amongst other curios in my home, you'll never find it in my guns.