http://crackershell.com/check those out
we used them on the gillneter i used to work on. works in any 12ga shotgun, the ones we used popped out a seal-bomb up to 200 feet then exploded.... they are pretty quiet comming out of the barrel so you can acctually have your round land right next to a seal then..... BOOOOOOOOOOOOM!!!!
that site also sells beanbag rounds, rubber buckshot and rubber slugs...
if the cops shoot em at people, and call it non-lethal... then these definatley should fit the bill
