RE: BroadHeads... Fixed or mechanical?
You got enough power behind the arrows to shoot either.
However, with the huge number of fixed blade heads available today that will fly every bit as good as any mechanical there really is no reason anyone needs to shoot a mechanical to hunt big game.
Ten years ago mechanicals really caught on when the best flying broadhead was a Muzzy. These large heads could be a real pain in the arse to tune. But with todays shorter and more aerodynamic fixed blade heads a mechanical just isn't needed any more.
Some of the newer fixed blade heads such as the NAP nitron and Rocky turbo actually have far less blade surface area expesed than many mechanicals do. It's no wonder that they fly so good now.