I just brewed an IPA with BIAB. Brewhouse efficiency was 80% which is exactly what I expected. Everything went great until the very end. The estimated OG for this recipe, according to BeerSmith 3 was 1.071. My measured OG was only 1.060. This is confusing to me since my measured pre-boil volume and gravity equaled the BeerSmith estimated pre-boil volume (8.58 gallon) and gravity (1.049). The target batch size was 5 gallon. 4.75 gallons actually made it from brew kettle to fermenter, so I only topped up with one quart of distilled water.
Is there any logical explanation for my OG being lower than expected? How significant is that difference? Will the FG be proportionately lower, leading to the same ABV?
Thanks.
Is there any logical explanation for my OG being lower than expected? How significant is that difference? Will the FG be proportionately lower, leading to the same ABV?
Thanks.