I brewed a partial mash imperial stout on Sunday. My target OG was 1.090 but because I tried to use too much grain compared to the water capacity of my brew kettle (BIAB method), I ended up only hitting 1.070 (had to add water back into the boil in order to hit post boil 2.5 gallons). Lesson learned for future brews about water to grain ratio and it's impact upon efficiency.
The problem is that before I took my OG reading, I had already rehydrated my 1.5 packs of S-05 yeast, per MrMalty's pitching recommendations on five gallons of 1.090 OG beer. So I ended up pitching 1.5 packs of yeast. But based on the 1.070 actual OG, I should have only pitched 1.2 packs.
My question then is whether I overpitched so much that I can expect strong off flavors to result (fortunately, a black as night stout should in theory mitigate some of that) or if my rate of overpitching was light enough where the beer won't end up tasting like a mess.
Primary: Winterfell Black Stout
Bottled: It's the Most Wonderful Time for a Beer Xmas Ale, Rumplepumpkin Imperial Pumpkin Porter, Walder Frey's Treacherous Smoked Mild.