Originally Posted by McCue
Which is right?
I didn't read the entire "long way" formulation, but scaling up by 1.52 seems high to me, although it's probably more accurate. I'm guessing you'll miss your gravity if you use the efficiency scaling that you outlined. The reason is that your 62% is likely based on med gravity brews, and your efficiency will suffer as the OG goes up. Have you done no sparge brews with pre-boil gravities this high before? There are variables unique to everyones system and process that the formulas can't account for, so it's hard to say which one will get you closer to your goal. Sorry I couldn't be more help.