I brewed an extract imperial stout today, aiming for OG of about 1.071, ABV of about 8.1%. My method was steep the specialty malts in 2.5 gallons of water, add DME and bring to the boil, add hops, boil for 60 min, cool and add 2.7 gallons of water and pitch yeast. I ended up with an OG of 1.098...