I'm usually one of the ones touting D&DH articles....but this recent issue has an article discussing the advantages to a heavy hunting arrow....and the author says this:

"But really, all you need to know about momentum is that, all things being equal, heavier and denser objects traveling at the same speed as lighter objects will have greater momentum. Putting it another way, it is more difficult to stop a heavy arrow, which means it will penetrate more deeply".

If you're touting heavy arrows over lighter arrows.....what's wrong with these statements?