Say I am brewing a beer that is supposed to have an OG of 1.050. I'm doing all-grain brewing and at the end of my mash & sparge, if I took the gravity at that point, what should I expect?
I think because I am pre-boil, the gravity at that point would be somewhere lower than the expected 1.050, but can I calculate that to make sure I am on the right track?
If I can figure out an expected post-mash gravity, if I do not hit it, are there adjustments I can make at that point? Boil longer? Add some extract?