TAOFLEDERMAUS was experimenting to see a big bang.
Watch this video and see this improvised giant shotshell hurl inflatable balls high into the air.
Their video displays an impressive homemade super shotshell.
All of the regular shotgun shell components are there that are usually needed, though significantly larger. The bucket is the shell, Tannerite is the propellant, and then the wadding and the projectiles are inflatable balls, in this case.
With a mighty explosion triggered by an accurate shot with an SKS rifle, the balls sail high into the sky. Now that is indeed a shotshell that is perfect for the next backyard barbecue.