ORIGINAL: LKNCHOPPERS
At some point a lighter arrow travelling faster will have the same KE as a heavier arrow going slower. There will be more KE retained down range from the heavier arrow but if you don't shoot that far with that heavier arrow you may not reap the benefits. You have to make trade offs and figure out what is best for your circumstance and be confident. I shoot a 403 grain arrow at 69# 280 fps. I think it is sort of middle of the road to light but not super light.
No sir. The lighter arrow will NEVER carry the same KE as a heavy arrow, no matter the range. We've already established the heavy arrow has more off the bow, and we've already established a heavy arrow retains it's velocity better than a light arrow.....The light arrow simply CANNOT carry more.....It can't.