Twig they aren' t designed to perform in cardboard, or foam or anything like that........It' s the nature of the design. They need hair and flexible hide to get those tips swinging out and open. In the materials you mentioned the blade tips grab, and they will simply punch through .
You can' t in any way compare performance on live game to a sheet of cardboard. They will open everytime on an animal........never on cardboard.
I' ve been shooting Rocket expandables since 1997.