While enjoying one of Avery Brewing's high-gravity beers recently, I began to wonder just how hard it would be to brew a beer in excess of 16% alcohol by volume. The best I've managed to date has been a Belgian-style dark strong ale that came in at 12.8% ABV. Could I really push yeast to deliver a beer (in this case a hybrid of mead and beer) at 16% or higher ABV? I wanted to find out. I began by researching what's known and published online about "really high gravity" brewing like this. Below is what I learned: Some sources suggest aiming for an OG of 1.106 initially. Others suggest keeping it to 1.120. White Labs, in its notes for WLP099 Super High Gravity Yeast, suggests a lower gravity - something that would produce a 6-8% beer, and adding fermentables later. Wort pH during the mash should stay between 5.0 and 5.3. Be sure to increase the amount of hops used to offset the higher gravity and sweetness of the alcohol you'll be generating. Add nutrient...