I'm just curious about how to figure out the gravity on a parti-gyle batch, namely a high gravity 3 gallon batch and a small beer 5 gallon batch. My thinking is that the 3 gallon batch will basically be the first running of the mash, and, using 2 quarts/pound of grain sparge calculation, get two beers from one mash and one sparge session.
I am deciding between a 3 gallon wheat triplebock/ 5 gallon dunkelweizen and a 3 gallon barleywine/ 5 gallon pale ale. Of course, I might do both.
Would a 13-15 pound grain bill do it?
I'm assuming OG around 100 for the big beer, and high 40s/low 50s for the 5 gallon batch (to be adjusted with DME if necessary).
Any reason this is out of the realm or plausibility?