I brewed an IPA about 3 months ago. I only did 5 gallons, so I divided yours by 2 to compare it with mine. They are fairly similar. You have one more pound of malt than I had (when divided by two), but I got 84% efficiency, and ended up with an OG of 1.074.
I also used Northern Brewer (3 oz at 7% 60 min), Fuggles (1.6 oz at 5% for 30 min), and EKG (1 oz at 5% for 5 min). for the hops, with another oz of EKG for dry hopping. According to Promash, this gave me 63 IBU's, while yours gave me 83.
I consider mine to be under-hopped, but the Fuggles and EKG's come through nicely.
Next time I brew it, I will add an extra ounce of bittering hops, which should bring up the IBU's to 81, which is just about the same as your original suggestion.
-a.
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