I have done extract batches in the past but not with full boils. I plan on boiling at least 5.5 gallons and then top up if needed. My system usually boils off a gallon per hour i just don't want to overshoot. My recipe is for a sierra navada clone. Should i adjust my hop amounts? recipe below
FG = 1.010-1.016
IBU = 35
6-lbs Light dried malt extract
12-oz crystal malt 120L
1.25-oz Perle hops (60 minute) 7.7 alpha pellets
.5-oz cascade hops(35 minutes) 5.2 alpha flowers
1-oz cascade hops (2 minutes) 5.2 alpha flower
I ran the ingredients through Beer Calculus
and got IBU = 33 with 3 gallon boil. When I up the boil to 5.5 gallons the IBU's = 39.8.
is 6-7 IBU points enough to make i big difference or should i just not worry about it and use all the hops.