Well these would probably leave a mark...
http://www.alloutdoor.com/2016/01/14/oath-expanding-fragmenting-slugs/
12ga slugs have been rightly known as good stoppers on dangerous game, but tend to over-penetrate in hominids. OATH Ammunition has two new designs that solve over-penetration along with greatly improving reliability in box-fed shotguns.
http://www.alloutdoor.com/2016/01/14/oath-expanding-fragmenting-slugs/