I brewed a hoppy pale ale yesterday with 8.8 lbs of grain. The OG was supposed to be 1.046 for 5.5 gallons.
I pre-heated my mash tun with 1.5 gallons of boiling water while getting my strike water ready. After the strike water reached temperature, I drained the mash tun of the warm water. Next, I began adding grain and water together in the mash tun, but forgot completely to close the valve that was attached to a hose for easy draining outside of the garage. It took me a minute to realize that my mash was getting thicker and that I was losing water and whatever else.
My question or point is this. I grind my grain until I have a decent mixture of flour and broken hulls. Could losing, lets say 1 gallon of liquid because of my mistake, cause my OG to drop 10 points?
After boiling, my OG was measured to be 1.036. The reason I ask is because my thought is that much of the flour was washed out. I ended with beer that was supposed to be small, but will now be much smaller. But hey, I still made beer
Any thoughts, or experiences similar to mine in the past? BTW, with my system, I usually get around 70 to 75 % efficiency.