A little over a year ago I did my first all-grain. I adapted it from some recommendations for a good Christmas ale. I listed the grains below. It was a huge success except for one problem. We ran out Christmas morning. I hit a fairly high gravity, 1.072. However I had a very low yield. With successive batches I learned that my problem was in the brew kettle. I have a very large heel. I need to boil roughly 7.25 to 7.5 gallons of wort to get 5 gallons. Roughly a gallon of that is evaporated, the rest is heel.
The brew kettle is on my short list to be replaced. Until then I've been making due with what I have. from recent batches I know that with 15# of grain and my typical efficiency, I get an OG somewhere in the neighborhood of 1.052 to 1.056 for five gallons. I'm going to be brewing another batch this weekend and I would really like to hit an OG in the neighborhood of 1.072.
- Should I expect this ratio to be a linear scale?
- How much grain should I add to scale this?
- Should I add a proportional amount of all the grains or just the base grains?
- 13# 2-row
- 1# white wheat
- 1# crystal 40L
- 0.25# special roast malt
- 0.25# roasted barley
Edit: Based on this recipe that gives me an OG of 1.052 - 1.0156, how should I scale up the recipe to achieve an OG of about 1.072 ?