I have a few ?'s on these bad boys! I had one season where i shot them and managed to harvest a late season doe with a speedy recovery! Great bloodtrail(it was Dec. in MN:)), and awesome penetration! My ?'s are, I have read that they whistle in flight, but do not remember hearing anything when i shot them? Are they durable, like durable enough for an elk, bear, moose hunt? How do they measure up to the Wensel Woodsman, and Terminators? Any other thoughts, or experinces welcome!!!