Capt Ray, I see where TFOX is coming from, and I would tend to agree with him.

You state that increasing speed 10% produces more KE than increasing the weight. It is not linear, in order to shoot faster with a lighter arrow your KE will stay approximately the same due to the drop in arrow weight. There are only 3 ways to increase speed with any given bow, 1. decrease arrow weight, 2. increase draw weight, or 3. increase draw length.

Here are my 2 setups out of my bow:
3D: 360 grain arrow, 284 fps, KE 64.4
hunting arrow: 455 grain arrow, 266 fps, KE 71

Heavier arrows, shot from the same bow, at the same poundage, same draw length and same draw weight will generally produce more KE than the lighter faster setups, to a point. There comes a point where the arrow becomes too heavy and there is too much speed loss.


Nothing wrong per se with shooting light fast setups, but they do not produce more KE in general.