Rogue Kit way off on IBUs

[chigundo]

I have a Rogue Brutal IPA with the following "anticipated" specs for the beer:

OG:1.060
IBU:60
Color:12 SRM

When I enter the ingredients into beersmith, it shows close to those specs except the IBUs, which is showing as 39.2.

How could it be so off? The bittering hops is just 1 oz of centennial, 8.7/4.6

 

[JollyIsTheRoger]

I have a Rogue Brutal IPA with the following "anticipated" specs for the beer:

OG:1.060
IBU:60
Color:12 SRM

When I enter the ingredients into beersmith, it shows close to those specs except the IBUs, which is showing as 39.2.

How could it be so off? The bittering hops is just 1 oz of centennial, 8.7/4.6

Are you doing a full boil or partial? If partial your utilization goes down and you won't get as high

 

[chigundo]

doing a full boil.. pretty sure i have thta indicated in beersmith but i'm new with that software