Brewing the all grain version of this kit tomorrow and I was putting the recipe into my brew software and I'm having an issue with the hop profile/IBU's. I'm hoping someone here has done this kit and can clarify. The hop profile as indicated on the "instruction" sheet is 1 oz of Magnum, 1 oz of centennial, and .5 oz of cascade. It's not entirely clear, but it seems that they are saying the magnum is the buttering hop, which should be in the boil for 60 min, the cent. is the flavor hop, which should be boiled for 30 min, and that the cascade is aroma at flame out. When I put this into my software it's putting the IBU's at around 80. The instruction sheet, however, says the expected IBU's are 28-31, which is appropriate for the style.
I called more beer and the rep that answered the phone brought up the recipe and said I'm reading the sheet right, but she had no answer for the disparity of the IBU's, other than to say that they use different recipe software so there are sometimes "small" differences in expected IBU's, but added that the shark bite has quite a bite, so it should be bitter. I've never tried it myself.
I'm considering halving the Magnum, which will bring the IBU's down to around 50.
Any insight or thoughts here?