I posted this in the support forum but apparently that wasn't the correct space for it.
The past few brews I've done have all come in with low OG's. My pre-boil volume and gravity are correct and my post-boil volume is correct but the post-boil gravity is always lower than the software predicts. Here's what I don't get: if I start with 7 gallons of pre-boil wort at 1.033, the post-boil gravity assuming 1 gallon loss to boil and evaporation should be 1.039 (rounded from 1.385) yet the software keeps telling me I should have a post-boil gravity of 1.041. (33 points per gallon in 7 gallons = 231. 231 points in 6 gal = 1.0385) No matter what recipe or what the starting gravity is, the software always predicts a post-boil volume that is impossibly high given the pre-boil gravity and the amount of boil-off. My equipment profile is configured correctly from what I can tell and my post-boil measurements always add up (as in: 7 gals pre-boil - 1 gal boil-off -.5 gal trub loss - 4% cooling shrinkage=5.25 gallons into the fermenter). What gives? I'm increasingly annoyed by relying on software that's inducing me to miss my OG. I'm sure it's user error, but where?
The past few brews I've done have all come in with low OG's. My pre-boil volume and gravity are correct and my post-boil volume is correct but the post-boil gravity is always lower than the software predicts. Here's what I don't get: if I start with 7 gallons of pre-boil wort at 1.033, the post-boil gravity assuming 1 gallon loss to boil and evaporation should be 1.039 (rounded from 1.385) yet the software keeps telling me I should have a post-boil gravity of 1.041. (33 points per gallon in 7 gallons = 231. 231 points in 6 gal = 1.0385) No matter what recipe or what the starting gravity is, the software always predicts a post-boil volume that is impossibly high given the pre-boil gravity and the amount of boil-off. My equipment profile is configured correctly from what I can tell and my post-boil measurements always add up (as in: 7 gals pre-boil - 1 gal boil-off -.5 gal trub loss - 4% cooling shrinkage=5.25 gallons into the fermenter). What gives? I'm increasingly annoyed by relying on software that's inducing me to miss my OG. I'm sure it's user error, but where?