Calculating SRM of PartiGyle
So I have a hard time reading math typed out, so I just took pics of my chalk board.
I'm not sure if I'm doing these calculations right. I made the assumption that color extraction was proportional to sugar extraction. That's color in MCU's, not SRM. http://i779.photobucket.com/albums/y...ryrigger/1.jpg http://i779.photobucket.com/albums/y...rigger/21.jpg http://i779.photobucket.com/albums/y...rigger/31.jpg 
Well, I guess I'll just brew it and see if these numbers look right....

I believe your assumption is wrong.
MCU =(lovibond of grain * Grain weight)/ volume of batch your SRM equation is right, but you miscalculated your MCU The volume used in the equation should be you batch/final volume. 22.8 SRM just from 1.8*L 2row is way off, 4.37 SRM for 16 lbs at 1.8*L I get 21.27 SRM for the batch 
By my calcs in Promash, with that grainbill for a total of 9.2 gallons, the total SRM would be 15.9  let's say 16. According to the Mosher partigyle guidelines, when you do a 1/3  2/3 split of that 16 SRM, it would result in 24 SRM for the 1.078 big beer and 12 SRM for the 1.039 small beer (at 75% efficiency).

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Is that 21.27SRM for the both the 3.2gal and 6 gal batch combined? 
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That spread sheet looks quite useful, I'll try figure out what formula they used for it. But not right now, as I'm in the middle of a bottling operation. 
so you your total volume is 9.2 gal?
I get 6.73 SRM for the 3.2gal batch and 19.76 SRM fo the 6gal batch I dont know if you still sum the MCU's then calculate the SRM like you would if it was one batch with the same volume, so I am going to step out of this one. 
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