triple mango ipa help

I'm trying to scale down Troegs scratch brew triple mango ipa to do a 10 or 12 gallon batch however im a little confused on the conversion. Their batch had a grain bill of 1275 lbs along with 60 lbs of honey and 50 lbs of cane sugar. This batch was for 12 barrels which comes to about 372 gallons. This means that a 10 gallon batch would still get around 34.27 lbs of grain. This seems like a lot even though it is supposed to be around 9% alcohol, any help with how to do a correct conversion is appreciated.

Sounds pretty right on... I was only able to scale to a .03 batch which is 11 gallons, but I got 38.25 lbs grain 1.8 lbs honey 1.6 lbs sugar. Calculated for 70% eff.

Here is the home brew recipe that won the contest. Troegs made some adjustments.

The abv on this beer ended up being 10.8%.

http://www.scotzinbros.com/recipe.php?recipesid=5

Looks like you already have this but for anyone else who has not.

Troegs recipe:

http://i465.photobucket.com/albums/rr17/mrr11880/9441466d.jpg

Why don't you use the source recipe that was used to make it....

Classification: Imperial/Double IPA

Source: Brad Moyer, submitted

This recipe was created by one of our own employees, Brad Moyer who recently won the local "Al´s of Hampden / Troegs" homebrewing contest. This beer will be brewed in early September by Troegs as one of thier "Scratch Series" beers. Brad suggest using frozen organic mangoes and a heafty dosing of fresh hops to really bring out all the citrus and fruit flavors that this beer has to offer. Also, a large yeast starter will be needed since this beer will be clocking in around 11.5% ABV.

Mango Triple IPA

Recipe Specifics

Batch Size (Gal): 6.00 Wort Size (Gal): 6.00
Total Grain (Lbs): 18.00
Anticipated OG: 1.091 Plato: 21.76
Anticipated SRM: 8.0
Anticipated IBU: 387.6
Brewhouse Efficiency: 75 %
Wort Boil Time: 90 Minutes

Grain/Extract/Sugar

% Amount Name Origin Potential SRM
—————————————————————————–
83.3 15.00 lbs. Pale Malt(2-row) Great Britain 1.038 3
2.8 0.50 lbs. Crystal 40L America 1.034 40
2.8 0.50 lbs. CaraPilsner France 1.035 10
11.1 2.00 lbs. Corn Sugar Generic 1.046 0

Hops

Amount Name Form Alpha IBU Boil Time
—————————————————————————–
3.25 oz. Columbus Pellet 15.00 182.7 90 min.
1.00 oz. Nugget Pellet 13.00 48.7 90 min.
0.75 oz. Columbus Pellet 15.00 34.4 45 min.
2.50 oz. Nugget Pellet 13.00 121.8 90 min.
0.25 oz. Centennial Pellet 10.50 0.0 0 min.
1.50 oz. Columbus Pellet 15.00 0.0 Dry Hop
1.50 oz. Centennial Pellet 10.50 0.0 Dry Hop
1.50 oz. Simcoe Pellet 12.00 0.0 Dry Hop
0.75 oz. Columbus Pellet 15.00 0.0 Dry Hop
0.75 oz. Centennial Pellet 10.50 0.0 Dry Hop
0.75 oz. Simcoe Pellet 12.00 0.0 Dry Hop

Yeast
White Labs WLP001 California Ale

Notes
Mash at 151 deg for 90 min
First dry hop addition 14 days long
Second Dry Hop addition – 3-5 days left
Rack off dry hops in secondary,then add 5 lbs of mangoes in the Terteriary

i was able to get close on beersmith with the recipe, i have seen the original recipe however i was more interested in the version troegs had posted. For anyone whos interested heres my conversion, minus the hopback.