Yes indeed. But, in this case, I agree with Ashby. He layed out his reasoning exceptionally well, if you read it with an open mind.

The fact remains that most modern bowhunters are very much keyed into speed and KE. Of course, like I said before, they HAVE to be when using ultralight arrows. Reason?

As I've posted many times before: A guy using a 700 grain arrow at 150 fps can pretty much figure on getting a passthrough on a deer. A guy using a 350 gn arrow at 300 fps would also tend to expect a passthrough. If KE was the end all/be all, then this would be flat impossible. The 700 grainer is only carrying a hair under 35 ft lbs of KE while the 350 gn arrow is cranking up 70 ft lbs. With such a wide variation in KE, we have to look elsewhere to see why both arrows are capable of achieving a passthrough. We find that the common denominator is both arrows have exactly the same momentum.

The light arrow is generating it's momentum with speed. Twice the speed, twice the KE, simply to equal the momentum and penetration potential of the heavy arrow.