Is it a blade grinder or a bur grinder? I was schooled by a roaster one day that the bur creates a more jagged and coarse edge, forcing the water to flow THROUGH the grind rather than AROUND the smooth and more rounded grind that comes from a blade grinder. Yes, it was a very intense conversation and exactly what one would expect from an Austin hippy burnout turned professional coffee roaster. Nonetheless I was convinced to give it a shot and I will say that there is a strong possibility that he is right. When I have the time to put that much effort into my coffee, I bur grind it and use and Aeropress coffee maker.
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This no doubt has been the biggest game changer to my coffee experience and I highly recommend it.