Originally Posted by Kaiser
yes, but did you substract 4% from the pre-boil volume?
How did you cool the sample for the preboil measurement?
Ok I got you. the preboil 13.25gallons was at 168 or so I bet after sparge, So assuming a 3% reduction (I assume that 168 deg water is not as expanded as 212 deg water). That would give me 77.9% mash efficiency and 74.1% post boil efficiency. That certainly gets it closer, but I don't think it is the true culprit. I'm assuming it was a measurement error along the way, but thanks for pointing this out. Does anyone take this 4% into account when calculating mash efficiency?