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Old 04-13-2012, 07:11 PM   #1
klbridle
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Default Help - Missed My OG by a mile

So I am still somewhat new to all grain brewing (maybe 10 batches in) and I am trying to brew an Imperial IPA with a targeted OG of 1.077. This was my second attempt at this beer and again I missed my OG by a mile. For the second time in a row my OG came in around 1.052. With the other beers that I have brewed I have nailed the OG when I assume about 70% efficiency. I have no idea what I am doing wrong or need to do different with a high gravity beer.

Here is the recipe I am using: mashed at 154 for 60 minutes, then mash out at 170 for 10 minutes.

Grains & Adjuncts
9.00 lbs Rahr Pale Ale
3.50 lbs Fawcett Maris Otter Pale Malt
1.50 lbs Briess 2-Row Caramel 10L
1.00 lbs Simpsons Caramalt

And just to note, I use a batch sparge method as I was only getting about 60% efficiency with the fly sparge on my rectangle cooler.

Any help or suggestions would be great.

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Old 04-13-2012, 07:15 PM   #2
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Are you crushing your own grain or is it precrushed?

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Old 04-13-2012, 07:21 PM   #3
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Are you using your own tap water? You could have really hard water, and if so should dilute with distilled if making a pale ale.

You could add some iodine to see if it turns purple, then there is starch still present and needs to sit longer in the mash.

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Old 04-13-2012, 07:22 PM   #4
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I've also been missing my target gravity by a mile. I just tried to make a strong IPA using 13lbs Pale Malt and 2lbs Pale Wheat Malt, and 1.5lbs crystal and 0.5 corn sugar. My OG was 1060, though my liquid volumes were out (too much) and there was a lot of wort left behind in the kettle, perhaps up to half to three quarters of a gallon, and lots of fluid in the 6oz whole hops used. My cooler is rectangular, with a single bazooka tube-style screen, and I'm wondering if my continuous sparge method isn't suitable, and I should go a batch sparge instead? Sorry, don't mean to hijack the thread, just adding detail about my similar issue...

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Old 04-13-2012, 07:31 PM   #5
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Quote:
Originally Posted by Dan View Post
Are you crushing your own grain or is it precrushed?
I am crushing it myself at the Northern Brewer store in Milwaukee. It did sit in the bag for about 18 hours before I brewed it so I am not sure if that had anything to do with it.
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Old 04-13-2012, 07:33 PM   #6
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Originally Posted by mbobhat View Post
Are you using your own tap water? You could have really hard water, and if so should dilute with distilled if making a pale ale.

You could add some iodine to see if it turns purple, then there is starch still present and needs to sit longer in the mash.

So, I have not heard of this process before. Do you just pull a sample of wort and add a few drops of iodine to that? I would interested in trying this on my next batch.
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Old 04-13-2012, 07:37 PM   #7
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Malt_Man - I found that with my rectangle cooler that the batch sparge worked a lot better. I am still new at this so take this with a grain of salt but I would say try it and see what happens. I found I was getting about 0.010 better with the batch method.

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Old 04-13-2012, 07:39 PM   #8
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You can use chalk to
test on since its white...see this

http://www.homebrewtalk.com/wiki/index.php/Iodine_test

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Old 04-13-2012, 07:40 PM   #9
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One thing not mentioned are your water volumes and batch size.

If your volumes are off you will also miss your OG.

List all your volumes for us:
Mash in
Mash out
Batch sparges
Pre boil
Post boil
Pre boil gravity
Post boil gravity OG
Amount in primary

Any top off water?

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Old 04-13-2012, 07:51 PM   #10
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Quote:
Originally Posted by klbridle View Post
I am crushing it myself at the Northern Brewer store in Milwaukee. It did sit in the bag for about 18 hours before I brewed it so I am not sure if that had anything to do with it.

It might be the LHBS crusher setting. Many people state their efficiency went up once they bought their own crusher as you can adjust the gap of the rollers, that what I experienced as well. Sitting 18 hours didn't hurt anything.

You ought to try to figure out your mash efficiency. It's pretty easy to do. I'll look around and see if I can find it equations and post back.
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