You are looking at speed and ke figures and forgetting about momentum. The figures you are looking at are like looking at muzzle velocities out of a gun. This is what the bow will do a few feet in front of it. Those are some REALLY light arrows. The heavier the arrow is, the more momentum it will have. Thus retaining more of it's energy farther down range and actually hitting the target harder. Lighter projectiles bleed off energy faster losing KE at farther distances. The differences may not be enough to worry about at 20 or 30 yards however, I didn't do the math. I would personally go with a heavier arrow and shoot around 250 something to retain more energy down range. That however is a personal preference, I'm sure others would dissagree with me.

Just something to consider any way.

What kind of bow and what settings are we talking about here? What is your draw length and weight? Just curious.

Paul