The way I've been doing it is my batch size is what actually goes into the fermenter. Very roughly .... 7 gal into the kettle from 1st runnings and sparge, boil off a gal and leave 0.5 gal behind with trub so 5.5 goes into the fermenter. That's my batch size. From that I'll bottle a tad bit more than 5 gal.
Is that how others see it?
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