Here is a nice article about some questions one might ask about over penetration. http://www.olyarms.com/index.php?option=com_content&view=article&id=14%3A223-penetration-information&catid=13%3Atechnical-info&Itemid=26 Its too long to post the contents.
Interesting. You guys are making me rethink a lot of what I do. Thank you!