You know, now that I look at it again it does seem off. I wonder if something got out of whack with beer smith. Is there a substitute for Chinook? I think I will try the sub in the same recipe and see if it comes out the same.
Just for fun I ran your recipe through BeerSmith. It almost exploded. If you do full boil, you're looking at a calculated 242 IBUs. If you're doing a partial boil, 125 IBUs.
Recipe Specifications
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Boil Size: 7.13 gal
Post Boil Volume: 5.30 gal
Batch Size (fermenter): 5.00 gal
Bottling Volume: 4.75 gal
Estimated OG: 1.084 SG
Estimated Color: 11.7 SRM
Estimated IBU: 88.3 IBUs
Brewhouse Efficiency: 70.00 %
Est Mash Efficiency: 0.0 %
Boil Time: 60 Minutes
Ingredients:
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Amt Name Type # %/IBU
8.0 oz Caramel/Crystal Malt - 40L (40.0 SRM) Grain 1 4.0 %
8.0 oz Vienna Malt (3.5 SRM) Grain 2 4.0 %
10 lbs Pale Liquid Extract (8.0 SRM) Extract 3 80.0 %
1 lbs 8.0 oz Candi Sugar, Clear (0.5 SRM) Sugar 4 12.0 %
1.00 oz Chinook [11.80 %] - Boil 60.0 min Hop 5 40.1 IBUs
0.25 oz Chinook [11.80 %] - Boil 50.0 min Hop 6 9.5 IBUs
0.25 oz Chinook [11.80 %] - Boil 40.0 min Hop 7 8.8 IBUs
0.25 oz Chinook [11.80 %] - Boil 30.0 min Hop 8 7.7 IBUs
0.25 oz Chinook [11.80 %] - Boil 20.0 min Hop 9 6.1 IBUs
1.00 oz Simcoe [13.00 %] - Boil 10.0 min Hop 10 16.0 IBUs
1.0 pkg Dry English Ale (White Labs #WLP007) [35 Yeast 11 -
I think you should do to your recipe whatever sounds right to you. To me, it sounds out of balance. I would reduce your 60 minute Chinook addition to 1oz, and the rest of your Chinook additions to 0.25oz. This will put your IBUs around 90. For a high-gravity IPA that will provide a better balance but still give you a extra bitter bite.
Chinook is a fantastic hop, don't let the pansies out there convince you it's too harsh. Let us know what you end up doing and make sure to come back when you've had a taste to let everyone know how it went.