Scoop out 10 jars of Oats into the pot wanting like at least 10lbs of grains cooked. A jar is almost 1lb dry every time. 12 hr Soak&simmer in good water w/gypsum.  Ended with (16lb soaked & simmered+ dried all day and bagged Grains).  

-3 four pound bags and 2 two lb bags. Incredible Math that I'd never know how to consider but that's pretty damn perfect 62% grain hydration right there. 

10 = 16 - 62% = 6.08 = the H2O