I agree with 5 shot on this. Not getting into all the number crunching, but at 205 fps your setup is not producing enough energy to effectively shoot any mechanical head, especailly one with a large cutting diameter.

Better to stay with something fairly narrow, 3 blades, and you'll get better results in the long run. Large cuts don't necessarily mean good blood trails. The arrow still has to pass through so there is a low exit hole---in the vitals.