Grain ordering/percentage of mash - Home Brew Forums
Register Now For Free!

Home Brew Forums > Home Brewing Beer > Recipes/Ingredients > Grain ordering/percentage of mash

Thread Tools
Old 01-18-2013, 12:54 AM   #1
Nov 2012
Willimantic, CT
Posts: 461
Liked 82 Times on 56 Posts

In preparation for my first AG batch I have 2 questions about measurements that may go hand in hand.

1. I know there will always be exceptions, but is there a general rule of thumb as to how much percent deviation from a recipe's weight of a grain item is acceptable before a noticeable or significant change in final product occurs? For example, a recipe calls for 10oz of a specialty grain, is 10.5 ok, 11? At what point is it significant. I'm sure crystal and base malts would have different tolerances.

2. When ordering grain from an online supplier, if they allow you to choose quantities down to the ounce, how reliable is this? I would not expect 100% precision, but how close are they usually (specifically AHS)? Is it a better idea to round up by a half pound or is it not worth it since they are pretty exact?

I ask because I'm doing a Founder's Red's Rye IPA clone and have zero experience with formulating recipes so i'm not sure how closely I must follow the recipe and how exact I can expect my order to be from the supplier...also it sparked the curiosity about how much deviation from a recipe is ok before you have actually changed the recipe.


Reply With Quote
Old 01-18-2013, 11:02 AM   #2
Jul 2009
Posts: 1,002
Liked 59 Times on 56 Posts

In reverse order, the online supplier is going to pretty much on the mark in their measurements.

As far as a percent deviation, I don't think there is a general rule of thumb. As you surmise, different malts will have different tolerances. Darker malts have smaller tolerances for deviation because their impact is greater.
Brody's Brew House
Primary: Spiced ale
Planned: Butternut squash & gala apple harvest ale; brown ale or porter; barley wine
Kegged: Nothing
In the fridge: Dogfish 60 minute; Imperial Stout

Reply With Quote
Old 01-19-2013, 01:10 AM   #3
Apr 2008
Cheektowaga, NY
Posts: 742
Liked 38 Times on 36 Posts

Beersmith has recommendations as to max % of a grain in each recipe. I don't know any off the top of my head, but certain grains are 'stickier' in the mash than others. Wheat is one example, rye is another.

I always try to be as exact as possible with my measuring but realize my scale accuracy is only about 2 ounces one way or the other. As hercher said some grains are more susceptible to changes than others, especially in light beers. Kyle

Reply With Quote
Thread Tools

Similar Threads
Thread Thread Starter Forum Replies Last Post
Ordering grain online modenacart Recipes/Ingredients 15 07-29-2014 09:44 PM
Grain ordering questions Yesfan Recipes/Ingredients 3 12-13-2012 09:14 PM
partial mash grain percentage SwillyBilly Beginners Beer Brewing Forum 4 02-21-2012 03:18 AM
Grain bill as Percentage VanHolton Recipes/Ingredients 5 11-05-2009 11:14 PM
Percentage of Rice Hulls for Wheat grain DesertBrew All Grain & Partial Mash Brewing 3 10-22-2005 06:57 PM

Forum Jump