The ultimate slug of doom is available at Ammunition to go for $13.95 for a box of 5. The description is as follows:
This is 12ga. DDupleks 2 3/4" 1 1/8oz Expanding Shotgun Ammo. The Hexolit 32 is a variation of the DUPO28 and is also a slug with an extremely enormous impact effect. When hitting the body, the frontal part of the slug instantly increases from 18.5 to 36-38 mm in diameter – this is the largest slug expansion diameter ever known. It creates an entrance hole with a 3.5 cm diameter, hits powerfully with all its expansion area and disintegrates into six symmetric splinters - essentially becoming six individual blades. The splinter cone causes an extensive area of damage. The unified effect of a hydrodynamic and pneumatic shockwave inside the body, along with splinter damage, ensures a unique instant stopping effect with the Hexolit 32 slug, which provides good results even with imperfect hits. This ammo comes packed in 5 round boxes/50boxes to a case.
I am currently using these as my home defense shell, but I may need to mix it up a bit.
In the video, you will only care about the first half. The second half is watching a tool almost cut his hand trying to dismantle the projectile with a knife.
UPDATE 6/17 - 1 Box ordered