Was at the range yesterday with a couple friends from work.
Did some of the "phone book" testing. In short, while the cutting through of paper doesn't mimic flesh of gelatin it does give a qualitative guide. And is also fun and easy to set up.
I wouldn't use it for any inter caliber comparisons. And it's probably not too good for deformation comparisons but it is neat. No photos, forgot my camera.
Box of Truth does have a neat run on "book shootin' " though. What I will note is that at the same distance with the same bullet in the same gun, that the cover the book has makes a huge difference.
I also bit the bullet (sorry for the pun) and placed an order for a LaserLyte training target. We'll see how that works.