ORIGINAL: Hoytail Hunter

I've read and studied zero articles about FOC and how it affects penetration but I've got a decent sense of physics I think, and here's what I think Jeff:

I'm sure other guys have already said this (I didn't read all the posts) but maybe if put in a different way, it'll all of a sudden click... Your arrow in abest case scenario enters the animal perfectly square (straight). As soon as it hits anything with a consistency less than air, it'll want to deviate from that straight line. The more weight that you have towards the rear of the arrow, the greater the tendency to deviate from that straight line because there's more weight back there to steer the front of the arrow.When there's deviation, some of the KE in that arrow is spent by the shaft (not the tip) pushing against the walls of the hole that the arrow is creating. Resulting in more side to side push ratherthan forward push. Resulting in less penetration.

Another way to think about it is throwing a baseball bat into water like a spear. If you throw it handle end first you have low, in this case, negative FOC. It probably wont govery deep into the water before doing a flip. On the other hand, if you throw the baseball bat heavy end first, it'll penetrate through the water much better and probably wont do a flip at all.