Alright just finished my first all-grain brew about an hour ago. I undershot my gravity by about 10 points. I was doing a 3 gallon batch of pale with a target gravity of 1.053, but I got 1.042.
5.75 lbs of 2-row pale malt
0.5 lbs or crystal 60L
Batch sparged target at 153 for an hour, actual of 152.
Sparged with 180 degree water to get a grain bed temp of 168ish.
I did 1.5 qts per pound of grain.
Used an absorption rate of 0.12 gallons per pound.
Cooler dead space of 1 qt.
Used 3.5 gallons to do the initial hour mash (was supposed to 3.35 I think but I rounded up).
Then I sparged with 2 gallons, left about 2 qts or so in the mash tun.
I collected about 4 gallons in my kettle and did a 60min boil.
.25 oz Magnum - 60min
.25 oz Perle - 30min
1 oz Cascade - 10min
.5 oz Cascade - 0min
Chilled to 75 degrees in about 12min.
Lost about 1 qt to hops and crap in the bottom of the kettle.
Ended with about 3 gallons of wort, I didn't really measure it though.
My efficiency was 56% if I calculated correctly, which is terrible even thought it was my first AG. What can I do to fix this for next time?