Also, food for thought, pic rel is the shot spacing requirement for early US ESAPI plates (2007). Shot one of .30-06 M2AP must be between 0.75-1.25" from any edge, then shots 2 and 3 must be no more than six inches (5-6" req'd for FAT) from the preceding hit. In other words, unlike NIJ, SAPI / ESAPI / XSAPI requires an edge hit - blocking cheat rings entirely.