I'm an extract brewer who just bottled his fourth batch, a Java Stout. This time I used a kit from Midwest although I did use the Recipe Editor as a means to record my ingredients and process, etc. http://www.brewersfriend.com/homebrew/r ... java-stout My question is what factors are likely causing me to miss my OG by such a gap? After topping up my primary fermentor to five gallons, and before pitching the yeast, I measured my OG as 1.070. The recipe editor predicted a OG of 1.046 and the Midwest brewing recipe sheet predicted OG = 1.042 - 1.046. Oddly, my FG is spot on with this site's recipe editor at 1.013 which if very close to what Midwest said to expect (FG = 1.010 - 1.012). Why is my OG so far off from what was predicted by both the recipe editor and Midwest? By the way, I increased the efficiency of my steeping grains to 50% in an attempt to somewhat close the gap between actual OG and the recipe editor's prediction. The change in predicted OG was only incremental. Thank you for any insights offered into this topic.