Im trying to make a 10 gallon batch in my 70 qt. tun with SG of 1080. Working with grain/water ratio of 2qt/lb. Grainbill from BeerSmith is 30 lbs of 2-row. Mash at 149 for 60 mins or until iodine is negative. Problem is that BS (and my calcs) indicate I’ll be mashing in w/ 18 gallons of water at 157.
Are these calculations off?
Is it even possible in my 70 qt tun to get a beer with SG of 1080?