I'm brewing my second all grain batch today. I'm doing my water calculations and I can't figure out what to do
. My first batch was a low gravity brown ale I mashed using a ratio of 2 quarts water to 1 lb of grain. That ratio on that batch yielded me almost exactly half the boil volume so I sparged with an equal amount of water.
The batch I'm brewing today is a higher gravity porter. It has 13lbs of grain and at 2 quarts to 1 lb of grain that gives me 6.5 gallons of mash water. I'm going to loose a gallon or so to the grain which would leave me needing to sparge with 1 gallon to reach a boil volume of 6.5 gallons.
I've read different numbers on mash water ratios from 2 quarts per pound down to 1 quart per pound. What should I use for a water grain ratio?