What's crazy is that, for all the poundage that a war bow requires to pull, it's still less powerful than a small-caliber bullet. A breastplate will easily stop a clothyard arrow with a hardened bodkin point, and a .38 Spl will blow right through. I tried doing some back-of-the-envelope calculations a while back, and IIRC a .22LR has more energy at the muzzle of a 14" rifle barrel than a 160# bow could put into an arrow. (Someone needs to double check my math on that though.)