I have read something on here about testing terminal performance of bullets using phone books. I looked and saw where there were several methods that are used. Here are a few questions that I also have? What method(s) are the most like deer sized game? How many phone books will I need to stop a 300 mag using 168 gr SMK and a 284 win with 140 gr. tsx? Most methods involve a box filled with phone books/ plywood exc.... Will each set up only be good to test one round? Thanks in advance for the help.