Still working on this AG thing and I'm looking at my efficiency.
For 3 batches, according to Beersmith, my "efficiency into boiler" has consistently been in the mid-70's. But my "brewhouse efficiency" which is calculated with post-boil numbers, is in the mid-60's.
So, does this tell me that my mash setup is relatively efficient, but somehow my boil process is not?
My pre-boil gravity is usually spot on to the estimate, but my OG is usually lower than the estimated OG. Could it be that my boil is not vigorous enough to evaporate off enough water and raise the gravity?