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Keep in mind that corn yield can be all over the place.

Inputs

Corn = 350 lbs at 33 ppg = 11,550 ppg

Unmalted Wheat = 110 lbs at 34.5ppg = 3,795 ppg

Peated Malt - 55 lbs at 37.5ppg =  2,062.5 ppg

Total = 17,407.5 ppg

Maximum Gravity

17,407.5 / 250 gallons water = 69.63 or 1.0696 SG potential

(15 plato) 61.1 / 69.63 = 87.7% Efficiency = This is not terrible.

 

Someone check my math, it's early.

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For your original post - 250 gal water, 350# corn, 220# malted wheat, 55# malt:

Inputs

Corn = 350 lbs at 33 ppg = 11,550 ppg

Unmalted Wheat = 220 lbs at 37 ppg = 8,140 ppg

Malt - 55 lbs at 32 ppg =  1760 ppg

Total = 21,450 ppg

Maximum Gravity

21,450 / 250 gallons water = 85.8 or 1.0858 SG potential

(16 plato) 65.4 / 85.8 = 76.2% Efficiency

My initial response was a bit of a swag at 19 plato - that would of been about 91% efficiency.

What's obvious here is between the two cases, you picked up significant efficiency by reducing the mash thickness.

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Thanks Silk. The other major variable I believe increasing efficiency in addition to a thinner mash, is the fact that the corn in the second example was hammer milled to flour as opposed to a horrible rough crack on the first.  Appreciate all inputs as I continue to get this dialed in.

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