the higher the KE, generally, the higher the momentum that will be imparted into the arrow from the bow, especially when you can tune the bow well to remove oscillations and vibrations from the arrow.
I was shooting 425 gr. 282 fps, producing KE of 75.06....I now shoot a 368 gr. arrow 310 fps, producing KE of 78.54......So, if higher KE = higher momentum (generally) won't my light arrow be carrying more momentum?? I'm so confused....