When I enter Tasty's recipe into beersmith I'm coming up with 52.4 IBUs instead of the 63 in his recipe. I'm set for the Raegar IBU calc. The only thing I changed was boil size, upped to 7.5 gal to leave 6 gal at the end of the boil. Any ideas why the IBUs are off for beersmith? Should I up the bitterness to reach Tasty's numbers? Thanks.
Here's the recipe i entered into beersmith:
Batch Size (Gal): 6.00 Wort Size (Gal): 6.00
Total Grain (Lbs): 16.00
Anticipated OG: 1.066 Plato: 16.20
Anticipated SRM: 19.3
Anticipated IBU: 63.2
Brewhouse Efficiency: 70 %
Wort Boil Time: 90 Minutes
Grain/Extract/Sugar
% Amount Name Origin Potential SRM
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75.0 12.00 lbs. Pale Malt(2-row) America 1.036 2
7.8 1.25 lbs. Cara-Pils Dextrine Malt 1.033 2
7.8 1.25 lbs. Crystal 40L America 1.034 40
6.3 1.00 lbs. Wheat Malt America 1.038 2
3.1 0.50 lbs. Chocolate Malt America 1.029 350
Hops
Amount Name Form Alpha IBU Boil Time
-----------------------------------------------------------------------------
1.00 oz. Northern Brewer Pellet 6.50 19.0 Mash H
1.25 oz. Northern Brewer Pellet 6.50 30.8 60 min.
1.00 oz. Northern Brewer Pellet 6.50 6.6 15 min.
1.50 oz. Cascade Pellet 6.00 6.8 10 min.
1.50 oz. Cascade Pellet 6.00 0.0 0 min.
2.00 oz. Centennial Pellet 9.00 0.0 Dry Hop
Yeast
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White Labs WLP001 California Ale Yeast
Mash Schedule
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Saccharification Rest Temp : 154 Time: 30
Mash-out Rest Temp : 165 Time: 15
Sparge Temp : 170 Time: 45
