So I am planning to brew a session pale with 8.40# of grain for a 5.5 gallon batch. Utilizing a popular brew software program, it indicates that I need to mash in with with 2.88 gallons of water and sparge (in my case, batch sparge) with 7 gallons. It seems rather low amount of strike water and a large amount of sparge water. But, it is consistent with the 1.25 qt/lb ratio.
I typically mash in with roughly 4-4.5 gallons (based on the recipe) and try to create equal runnings, but for some reason, I am getting drastic numbers on this one, utilizing both software and my own calculations.
Roughly 2 gallon evap (rocky mountains), with little equipment loss.