And you call yourself an engineer.
Obviously, you have gotten older. Your hearing isn't as fast as it used to be.
When your arrow had 125 up front, it was faster, and you couldn't hear it because it was gone before your ears could catch up with the sound. Now that your arrow is going slower, you can catch the noise. Cut your feathers down so the arrow goes faster, and it will seem quiet again.
I find that you can see the noise leave the arrow when you burn the feathers. It goes out with the smoke.
Killdeer
