I am thinking about trying all grain but one concept I can’t get my head around. How do you know if you are going to be able to hit your desired OG? Do you take a gravity reading, adjust for temp and then extrapolate that into gravity for 5 gallon? My thoughts were that if the efficiency was not good I could add some extract to bring up the gravity to the desired level.
One other question. I have created my own house ales with extract recipes. What base malt would I use if I am currently using NB’s gold LME?