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Old 10-22-2012, 12:51 PM   #11
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I had similar issues when I started and I just adda pound to the base grain each batch and I hit my target OG. You might just have lower efficiency. Around 60-65% is my guess. It will only cost you an extra buck or two for the additional grain. Also, you should check out ray Daniels book "designing great beers" because he has calculations on how much dme to add to get your OG up out of the mash tun.

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Old 10-22-2012, 02:06 PM   #12
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Tighten your mill up and condition your grain.

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Old 10-22-2012, 02:40 PM   #13
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Try using a thinner mash as well. Most people see efficiency jumps when they go from 1.25qt/lb to 1.5 or higher.

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Old 10-22-2012, 02:59 PM   #14
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what do you mean by "condition your grain"?

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Tighten your mill up and condition your grain.
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Old 10-22-2012, 03:01 PM   #15
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should i add the dead space difference (0.6 gallons) to the mash as well?

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Try using a thinner mash as well. Most people see efficiency jumps when they go from 1.25qt/lb to 1.5 or higher.
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Old 10-22-2012, 03:28 PM   #16
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how would i calculate my efficiency using the numbers i pulled? i think Jamil says all the recipes in his Brewing Classic Styles book are based on 70% efficiency.

pre-boil volume / gravity: 7 gallons - 1.040 (his: 7 gallons - 1.055)
OG / batch size: 1.052 - 5.5 gallons (his: 1.065 / 5.5 gallons)
I just ask Beersmith, so can't tell you the calculations. If you don't want to get the brewing software, start by adding a lb or two of grain to your next recipe and see how close you get. But brewing software is a big help to me.
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Old 10-22-2012, 03:55 PM   #17
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I don't use Beersmith but can't you set it up to account for your equipment and its associated dead spaces? Sounds like you might just need to play with Beersmith a little more. Also, don't take Jamil's pre-boil 7 gallons for gospel. I need 7.5 to reach my 6 gallons post-boil for a 1 hour boil.

I suppose the first step is to check your crush. Can you post a pic of some crushed grain for us? Might just need to tighten your mill.

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Old 10-23-2012, 02:07 AM   #18
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+1 for tightening up your mill. When I took my BC from .039 to .034 my efficiency went from 68% to 82%.

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Old 10-23-2012, 12:44 PM   #19
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Quote:
Originally Posted by GoldenShowerGladiator
what do you mean by "condition your grain"?
Take your grain and spray it lightly with tap water. Mix it around so that the grain is uniformly slightly damp (I use two ounces per 10 lbs) and let it sit for 15 minutes before milling your grain. It soaks in to the husks and causes then to stay intact when milling which gives you much better run off when sparging. It also allows you to mill your grain finer. I have mine at 031 and will be moving it to 029 next brew.
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Old 10-23-2012, 10:43 PM   #20
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Quote:
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something i noticed today was...let me start with what i use. i use a basic 10 gallon Rubbermaid cooler with a braid as my mashtun. i have 0.6 gallons of deadspace. should i add 0.6 gallons of strike water? for instance, i roll with 1.25 quarts water per 1 pound of grain. i had 14.75 lbs of grain today and used 4.6 gallons of water for the mash. would adding that 0.6 gallons (5.2 total in theory) improve anything?
Ignore the dead space numbers.

Your numbers dont sound far off. I mash with 13lbs and 4.25 gallons, then sparge with another 4 gallons and end up with 6.75ish gallons which boils down to 5.25 or so usually, netting me just over 5 gallons after trub.

To get these numbers, I set my batches to 5.5 gallons in Beersmith.
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