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Old 12-24-2012, 03:46 PM   #1
moboy
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Feb 2012
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I'm brewing a stout and my pre-boil reading is way off. Beersmith says my og should be 1.044. My og is reading 1.036. How bad is this. Should I panic.

 
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Old 12-24-2012, 03:48 PM   #2
Johnnyhitch1
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All grain or extract?
Recipe?
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Old 12-24-2012, 03:49 PM   #3
whoaru99
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No panic it's not far off and you have a chance to make it closer if you like post boil with careful top off to final volume.
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Old 12-24-2012, 03:49 PM   #4
moboy
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All grain

 
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Old 12-24-2012, 03:50 PM   #5
moboy
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All-Grain (assuming 75% efficiency):

6.5 or 7 lb Pale Malt (2 Row) US (2.0 SRM)
1.5 lb White Wheat Malt (2.4 SRM)
1.00 lb Caramel/Crystal Malt 60L
0.75 lb Chocolate Malt (350.0 SRM)
0.50 lb Roasted Barley (300.0 SRM)
0.50 lb Lactose (Boil 10 min)

0.75 oz German Magnum [13.40 %] (60 min) - 27.0 IBU

1.00 Whirlfloc Tablet (Boil 10 min)
1.00 tsp Yeast Nutrient (Boil 5 min)

Mash 60 min @ 152

Ferment 1 month @ 67 degrees F
I carbonated 2 volumes, but I suppose you could go higher

 
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Old 12-24-2012, 03:56 PM   #6
Johnnyhitch1
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Only thing i can think off is that conversion in the mash was not complete.
Did the temperture flucuate? what did you mash in? how much runoff and sparge water did you have?

Also with that grain bill you should see around 1.052 OG on a 5 gallon batch assuming 72% efficiency

Make sure you adjust for temp difference also.
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Old 12-24-2012, 04:04 PM   #7
moboy
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Mash in with 4 gallon at 152 for 60 min. With 20 minutes left Boil my temperature dropped to 145. I added he and over shot my temp to 160. I stirred until Mech lowered back to 152.

I fly sparged with 6 gallon and collected 8 gallon.

 
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Old 12-24-2012, 04:05 PM   #8
stpug
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EDIT: See yoppers suggestion below - an oversight on my part ENDEDIT

I've read that wheat malt can lead to low efficiencies due to not full extraction - this may or may not have contributed to you missing your numbers. Some folks will mash longer; some will preboil the grains; some will grind extra; all to help with good conversion when using them. I recently used about 1.5 lbs of wheat malt and had it tripled milled which still wasn't fine enough for my liking so I pulsed it a few times in my food processor prior to using and I ended up hitting the numbers I was after.

 
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Old 12-24-2012, 04:17 PM   #9
Yooper
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Did you cool the preboil sample to under 90 degrees or so? It's really important to do that if you're using a hydrometer, as readings over about 100 degrees (even with conversion tables) are notoriously inaccurate and so useless.
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Old 12-24-2012, 04:36 PM   #10
moboy
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I use a refractmeter

 
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