Dry, rough track with small rocks. Stock tires? I like your pressures.
I would keep the pressures that you run and experiment with going up/down 1 psi in each direction. You can go up/down 2 psi if you cannot tell the difference.
Going with higher pressures, you may feel less confident initially, but the bike will handle the bumps, the rocks, and your screw-ups better. Going down, you may get overly excited with confidence until you hit something hard.