The batch is for 15L total, if I read it correctly, so that's pushing 4 gallons. If we assume 3.5lbs sugar (1.5kg x 2.2 = 3.3lbs + raisins), that's 3.5lbs x 45ppg = 157.5 gravity points / 4 gallons = 1.039 predicted OG.
Revvy, I'm glad you got us checking the math on this one. So, if that's...