OG and IBU significantly different from posted recipe

[jbedell2]

I've checked all the things I can think of, but I'm still getting a significant difference in OG and IBU between a recipe posted on HBT and the one I've entered in BF. OG should be 1.077 and I'm getting 1.083, and IBU's should be 36 and I'm getting 47. What's especially strange is that I have efficiency set to 70% and the recipe is listed at 75%, which I would think would make my numbers lower, not higher. Here are the two recipes:

HBT Version:

Recipe Type: All Grain
Yeast: Safale-05
Yeast Starter: Nah
Batch Size (Gallons): 5
Original Gravity: 1.077
Final Gravity: 1.015
IBU: 36
Boiling Time (Minutes): 60
Color: 17
Primary Fermentation (# of Days & Temp): 3 weeks
Tasting Notes: Complex malt and nicely blended spices and hop aroma

Mash Efficiency: 75.0 %
Fermentation Temperature: 64 degF

Fermentables
US 2-Row Malt 13lb 0oz (84.1 %) In Mash/Steeped
UK Medium Crystal 8.00 oz (3.2 %) In Mash/Steeped
Belgian Special B 8.00 oz (3.2 %) In Mash/Steeped
German Wheat Malt 4.00 oz (1.6 %) In Mash/Steeped
US Chocolate Malt (350L) 3.20 oz (1.3 %) In Mash/Steeped
Sugar - Honey 1lb 0oz (6.5 %) End Of Boil

Hops
US Centennial (9.4 % alpha) 1.00 oz Bagged Whole Hops used 60 Min From End
US Centennial (9.4 % alpha) 0.50 oz Bagged Whole Hops used 30 Min From End
US Centennial (9.4 % alpha) 0.50 oz Bagged Whole Hops used 5 Min From End

Other Ingredients
Irish Moss 0.01 oz used In Boil
Vanilla Beans 1
Orange Peel, Bitter 1 Tbs
Cinnamon Stick 1
Ginger Root 1Tbs (dehydrated or fresh)

Single Step Infusion (67C/152F)


And my BF Version:

HOME BREW RECIPE:
Title: Holly - Christmas Ale
Author: jmo88 - HBT

Brew Method: BIAB
Style Name: American Brown Ale
Boil Time: 60 min
Batch Size: 5 gallons (fermentor volume)
Boil Size: 6.2 gallons
Boil Gravity: 1.060
Efficiency: 70% (brew house)

STATS:
Original Gravity: 1.083
Final Gravity: 1.015
ABV (standard): 8.92%
IBU (tinseth): 46.93
SRM (morey): 17.66

FERMENTABLES:
13 lb - American - Pale 2-Row (84.1%)
0.5 lb - United Kingdom - Crystal 60L (3.2%)
0.5 lb - Belgian - Special B (3.2%)
0.25 lb - German - Wheat Malt (1.6%)
3.2 oz - American - Chocolate (1.3%)
1 lb - Honey - (late addition) (6.5%)

HOPS:
1 oz - Centennial, Type: Leaf/Whole, AA: 10, Use: Boil for 60 min, IBU: 31.63
0.5 oz - Centennial, Type: Leaf/Whole, AA: 10, Use: Boil for 30 min, IBU: 12.15
0.5 oz - Centennial, Type: Leaf/Whole, AA: 10, Use: Boil for 5 min, IBU: 3.15

MASH GUIDELINES:
1) Infusion, Temp: 152 F, Time: 60 min

OTHER INGREDIENTS:
0.01 oz - Irish Moss, Time: 15 min, Type: Fining, Use: Boil
1 each - Vanilla Bean, Type: Spice, Use: Bottling
1 tbsp - Orange Peel, Bitter, Type: Spice, Use: Bottling
1 each - Cinnamon Stick, Type: Spice, Use: Bottling
1 tbsp - Ginger Root, Type: Spice, Use: Bottling

YEAST:
Fermentis / Safale - American Ale Yeast US-05
Starter: No
Form: Dry
Attenuation (avg): 81%
Flocculation: Medium
Optimum Temp: 54 - 77 F
Fermentation Temp: 64 F


I understand there can be small differences, but these values seem significantly off. Thanks for any insight anyone can offer.

 

[Ozarks Mountain Brewery]

have you set up your general/equipment settings correct with correct losses and pot size?, what are your water levels?

 

[jbedell2]

Thanks for the response. I have my equipment settings pretty well dialed-in. I haven't ever messed with any Water Chemistry settings - I always just leave that alone. Here's the Quick Water Requirements screen:

Water Gallons Quarts
Total mash water needed 7.1 28.4
Grain absorption losses -0.98 -3.9
Starting boil volume 6.12 24.5
Volume increase from sugar/extract (late additions) 0.08 0.3
Boil off losses -1 -4
Kettle dead space -0.13 -0.5
Hops absorption losses -0.08 -0.3
Amount going into fermentor 5 20
Total: 7.1 28.4

 

[Ozarks Mountain Brewery]

I will note that I've found that a lot of people using other software and posting a recipe do not match what shows up here, so I when I find something I like I change the recipe to account for my system but keep the IBU, Original, Final gravity and Color as close as I can, and use my efficiency not theirs. The real issue is that nobody's system is the same and other software shows different results. So I should say that what you’re trying to do is normal

 

[jbedell2]

Thanks for the response. I might just try targeting 5.5 gals into the fermentor instead of 5, since that should get me close to all of the numbers in the original recipe.