To put it simply these slugs deliver CHAOS
These slugs are made from solid steel. Not to worry the O-rings keep the slug centered in the barrel. The steel slug does not contact your barrel. These slugs are safe to shoot from a smoothbore or rifled barrel shotgun. When the mostly flat surface hits a target it will start to tumble. Like a huge 5.56 bullet. With its 2600 ft/lbs of muzzle energy, it's like turning your shotgun into a cannon that will destroy whatever is in its path.