Tetts and Ace IPA

[slimer]

So I had these 2007 Tettnanger Pellets that were rated at 7.1% Alpha and tasted the hydro sample yesterday. Let me just say that it didn't taste like ~70 IBU's. I made a correction to the alpha (6%) and now it seems closer to what it should be.

Anyone else have problems with maintaining the alpha of their hops? These were vacuum sealed in a freezer that is maintained at ~5 degrees F.

Tetts and Ace IPA
English IPA

Type: All Grain
Date: 3/7/2009
Batch Size: 5.50 gal
Brewer: Slimer
Boil Size: 7.39 gal Asst Brewer:
Boil Time: 60 min Equipment: Brew Pot (15 Gal) and Igloo/Gott Cooler (10 Gal)
Taste Rating(out of 50): 35.0 Brewhouse Efficiency: 85.00
Taste Notes:

Ingredients
Amount Item Type % or IBU
6 lbs 8.0 oz Pale Malt (2 Row) US (2.0 SRM) Grain 54.17 %
2 lbs Munich Malt (9.0 SRM) Grain 16.67 %
2 lbs Vienna Malt (3.5 SRM) Grain 16.67 %
1 lbs Toasted Malt (27.0 SRM) Grain 8.33 %
8.0 oz Wheat Malt, Bel (2.0 SRM) Grain 4.17 %
1.00 oz Tettnang [7.00 %] (Dry Hop 14 days) Hops -
1.50 oz Tettnang [6.00 %] (60 min) Hops 26.0 IBU
1.00 oz Tettnang [7.00 %] (Dry Hop 7 days) Hops -
1.50 oz Tettnang [6.00 %] (15 min) Hops 12.9 IBU
1.50 oz Tettnang [6.00 %] (10 min) Hops 9.4 IBU
1.50 oz Tettnang [6.00 %] (5 min) Hops 5.2 IBU
9.50 gal All Westmont Water Water
1 Pkgs SafBrew Ale (DCL Yeast #S-33) Yeast-Ale

Beer Profile

Est Original Gravity: 1.067 SG
Measured Original Gravity: 1.068 SG
Est Final Gravity: 1.017 SG Measured Final Gravity: 1.017 SG
Estimated Alcohol by Vol: 6.49 % Actual Alcohol by Vol: 6.66 %
Bitterness: 53.5 IBU Calories: 308 cal/pint
Est Color: 8.2 SRM Color: Color

Mash Profile

Mash Name: Single Infusion, Medium Body Total Grain Weight: 12.00 lb
Sparge Water: 2.63 gal Grain Temperature: 72.0 F
Sparge Temperature: 168.0 F TunTemperature: 50.0 F
Adjust Temp for Equipment: TRUE Mash PH: 5.4 PH

Single Infusion, Medium Body Step Time Name Description Step Temp
60 min Mash In Add 18.00 qt of water at 166.7 F 152.0 F
10 min Mash Out Add 10.00 qt of water at 208.6 F 170.0 F