Application to Penetration and Impact Georges Voyiadjis, Eric Buzaud, Ioan R. Ionescu. invariant model, it is able to provide high-fidelity predictions of the. Extreme Penetration: A Fisting Story - Kindle edition by Jodi Joyce. Download it once and read it on your Kindle device, PC, phones or tablets. Use features like. I see no reason for extreme penetration for defense. A defense bullet needs to "dump" all it's KE into the.