These little shells…. .
Could be interesting. But maybe not.
http://thearmsguide.com/4177/aguila-minishells-home-defense-solution-or-marketing-gimmick/
http://www.fieldandstream.com/blogs/gun-nuts/2013/07/shotgun-ammo-review-aguila-12-gauge-shells
http://www.outdoorhub.com/stories/2015/12/02/aguila-minishell-little-shotshell/