2) 18 to 21 BHN after about 3 weeks of aging. The temperature of the boolit when it hits the water and the temperature of the water affects final hardness.
Does it continue to get harder or is 3 or so weeks where the hardness peaks out. Since the properties change is it best to wait and let it harden before shooting or shoot within the 3 weeks. I'd think it would change the way the bullet shoots.