Well, you could buy your own ballistic gelatin, and do your own tests...
There's a company that sells ready-to-use tubes of ballistic gelatin, although I've forgotten the name. Use Google to find "Ballistic Gelatin," and you'll get it.
Just drape some denim over the end of the tube, and have at it.
Then, all you need do is cut the tube in half lengthwise, and see what you have wrought.
Try clicking on one of these: