Agreed, it might not always be betterbut a heavier arrow shot from the same bow for all practical arrow weights always means more kinetic energy and momentum. That's just a fact and not opinion. Anyone who claims otherwise is simply incorrect.Don't take my word for it, look it up for yourself. Here's a start http://homepage.ntlworld.com/joetapley/ Go to the section on virtual mass. There are other sights as well or just get a book on archery physics.