Jeff,

This might be kind of lazy but when I googled FOC, Arrow flight/penetration, Dr. Ed Ashby anything along those lines. There is a mountain of info and charts and graphs and arrow building calculators and comparisons between compounds / tradition set-ups and even links to hunting.net past threads about the topic. You coulf probably read forfew days on the topic. Some really good stuff on ke and penetration I just read by Ashby.