Rook
Copper BB
Has anyone seen this product? Familiar with it?
http://www.thefirearmblog.com/blog/2017/06/01/shoot-shotgun-clean-no-real-theres-shotgun-shell/
http://www.thefirearmblog.com/blog/2017/06/01/shoot-shotgun-clean-no-real-theres-shotgun-shell/