homebrewtalk.com forum post

I have a brew that was supposed to have an OG of 1.080. When I measured it I got a reading of 1.077 after the correction (1.076 at 66 degrees). I took several measurements, spinning the hydrometer each time and consistently got the same result. I have a slight boil over, but other than that there really isn’t anything I can figure out how I didn’t get the expected OG. On top of that, using brewer’s friend extract calc I should be at 1.085 (5.25G water, 12 lbs LME).

Any ideas where I might have messed up?

Low OG with All Extract brew