So, I've read various threads on efficiency, but I am wondering what people do with that number.
Let's say that you typically get 80% efficiency, but the recipe you are following assumes 70% (e.g., Brewing Classic Styles states that 70% is assumed).
Do you adjust your grain bill down? Adjust the water up? Make no adjustments and brew a stronger beer?
I've been adjusting the grain bill, but then the guys at the LHBS give me funny looks when I tell them I am buying 3.94 lbs of some grain instead of an even number like 4.50.
So, if you are following a published (book or forum) recipe, do you buy the grain amounts specified or do you adjust them?