A broadhead like a Muzzy or any other cut on impact broadhead is more than sufficient for deer or most game for that matter. They are proven. The replacable blade broadheads from 20 yrs ago had something to be desired though. I think that the manufacturers have learned and adapted. I guess you think you are proving your point with the hard data is hard data comment? When I read his article I see what might help my current set-up. Not think that I need to take all of it as gospil. By him stating that a extreme FOC light arrow outpenetrates a reg FOC by 50% doesn't that negates the heavier arrow will penetrate more because of momentum.

That's called sarcasm. I have very think skin. Your reply tells me you do not.

I'm jumping thru Ashby's report. Does he compare weight forward arrows to the heavy arrows he shoots? Also, when one of you said that he considered 650 gr broadheads I thought you were kidding. But he actually says that.

I guess if I was hunting something like a Cape Buffalo I'd make sure I had big equipment. Of course, I would use something like a rocket launcher amd maybe Special Forces as back-up if I hunted buffalo. Those guys are crazy to sneak thru the brush after something that dangerous.