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Overshot target OG

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Mlevy01

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Oct 11, 2011
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Malmo
So Im not totally sure what happened here, but my starting OG was WAY over what was planned. I planned for 1.047 but it actually pushed 1.066 instead.

Luckily, I do my best to take very careful notes, especially when Im messing around with techniques new to me. This is what I did:

Apple Cider Wheat
1 k Muntons Light DME 29%
1 k Muntons Wheat DME 29%
750 g Apple Cider 22%
500 g Wheat Malt, Dark 14%
200 g Caravienne 6%
14 g Perle pellet 6.8% AA 60 min, boil
14 g Czech Saaz pellet 2.9% AA 5 min, post boil
White Labs Hefeweizen IV (WLP380)
Projections:
OG 1.047
FG 1.011
ABV 4.8%
SRM 7
IBU 11.8

Batch Volume 18 lt
Boil Volume 7 lt

Procedure:
• Measure out and crush wheat malt, place in grain bag.
• Cook in 2 lts water at 50 C (122F) for 30 mins
• Raise temp to 68 C (155 F) for additional 30 mins
• remove bag from pot, set aside to drip.In kettle, add water to get total amount of 3 lts
• Steep crushed Caravienne 30 mins, strain out
• Add water to 7 lt
• Bring to boil, add 500 g Light DME, and 500 g Wheat DME
• Return to boil, add bittering hops
• At T- 15, add rest of DME, cider, continue boil
• After 60 min, remove from heat, add finishing hops
• Cool to 21 C (70 F), strain to primary with 11 liters water
• Pitch yeast
• Primary 3 weeks, bottle 2week condition

Actual Readings
OG 1.066

I made this two weeks ago, the SG at the moment is 1.020.
So the question is this: how the heck did the OG come out so high?
Could it have been the addition of the apple cider so late in the boil (although, obviously the longer it boils, the more evaporation= concentration of sugars leading to a higher OG)?
Or, could it have something to do with the way the wheat was mashed (everywhere I read that wheat malts need to be treated before it releases all of its potential sugars), resulting in too much efficiency?
Or could it be that BeerCalculus just has some funny calcs in it?

O.K, sorry, Im ranting here.
:mug:
 
Two ideas for you to look into:

You mention boiling a total of 7 lt for at least 60 minutes, then adding to fermenter with 11 lt of water and assuming it was 18 lt? You will certainly have lost some volume due to evaporation during the boil. Depending on how vigorous a boil you had, you might have lost up to 4 or 5 lt. That amount will almost account for the difference between 1.047 and 1.066. Next time top up in the fermenter to 18 lt if that is what your recipe is based on.

What was the expected vs. actual SG of the apple cider you used? It is very likely that BeerCalculus could not read the label on the bottle of juice you added and may have under-shot it;)

Edit: I just ran the numbers and I have this beer at 1.051 for 18 liters before addition of the cider, so yes it looks like something went wrong in Beer Calculus.
 
What was the expected vs. actual SG of the apple cider you used? It is very likely that BeerCalculus could not read the label on the bottle of juice you added and may have under-shot it;)

Both of your Ideas make sense, I will monitor the boil volumes more closely next time.
Is there a calculation formula for adding specific gravities? For example, If the SG of the wort is 1.050, and the SG of the juice is 1.030, what is the new total SG?
 
Both of your Ideas make sense, I will monitor the boil volumes more closely next time.
Is there a calculation formula for adding specific gravities? For example, If the SG of the wort is 1.050, and the SG of the juice is 1.030, what is the new total SG?

Using made up liquid volumes...

(SG * Vol) + (SG * Vol) = New SG * Total volume

(1.050 * 5gals) + (1.030 * .5gals) = sg * total volume
(1.050 * 5gals) + (1.030 * .5gals) = sg * 5.5
5.25 + .515 = sg * 5.5
5.765 = sg * 5.5
1.048 = sg
 
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