I am looking into getting a 10gal water cooler to facilitate 5gal keg transportation/enjoyment and would like to know if I can mash 22# of grain in it as well? If not, what is the most that can realistically be mashed in a 10gal cooler?
According to the Green Bay Rackers Mash Caculator 22# of grain at 1.25 qt/lb thickness would take up 8.64 Gallons of space so I think you would be good.