NO MATERIAL has been found that accurately simulates how a bullet will act when it hits a real live critter! Ballistic gelatin may be close, but it has no bones!!

A wet telephone book, or any other wet anything, can only allow you to compare how different bullets act when they hit a wet whatever - and this means you have to get each whatever just exactly the same wetness as the last one you shot into to make the comparison valid-a very difficult thing to do.

The best way to determine bullet performance on game is to trace out the wound channels in actual game animals-an autopsy, if you will! Damn few people ever bother to do this thoropughly enough to come to valid conclusions.

The most recent comprehensive work along these lines that I am aware of being in print is in Bob Hagel's book, GAME LOADS AND PRACTICAL BALLISTICS FOR THE AMERICAN HUNTER. This is a book well worth reading.