I brewed a nano batch of single grain IPA and I don't know what I have done wrong.
Before I started, I calculated the O.G. and F.G. as shown in the picture bellow. After boiling the wort from 5.3 liters to 4.4 liters (~1 hour), I measured the O.G., and found it only to be 1.074 (pre-boil was 1.065).
The beer is in a small carboy now, so I haven't measured the F.G. yet.
- Heated up 4.4 liter of water to 72° Celsius (~161° Fahrenheit)
- Added crushed grains, the temp is now around 67° Celsius (~152° Fahrenheit)
- Turned off the stove and waited for an hour, but kept the temperature over 65° Celsius (~149° Fahrenheit)
- Started lautering with a sieve and washed the grains with warm water(around 67° Celsius), ended up with 5.3 liters of wort
- Started boiling the wort. After it reached boiling point, I turn down the heat the stove
- Still boiling a little bit for an hour while I added some hops. After the hour I got 4.4 liters of wort left. Measured the O.G. at 1.074. (used this calculator to get the right O.G. from hot wort)
- Cooled the wort down and racked it to the carboy & added yeast
Is there anything I'm doing wrong?
Are there some common causes for not achieving an expected O.G.?