RE: poor penetration
Now I'm becoming skeptical about what happened because I really respect the opinions of some of some (alot) of ppl here, but on the other hand I was there. Light was fading but it was only a 10yrd shot, I watched it happen. Also, the exit wound I found doesn't line up at all with the entrance wound, it should have been low front, but instead was as far back as the entrance wound.
The 1/2 arrow I recovered was spotless, I'm positive that it didn't enter and exit, it was like new!