Planning my first brew of the year (getting a late start, but been too damn cold in my garage).
Just doing a simple IPA with Chinook for bittering, and Centennial late in the boil. Designing it in Beersmith.
All the hops are leaf, the Chinook I grew myself, the Centennial I got from someone that was ripping out the plant (unfortunately I didn't get there in time to get the rhizome)
When I enter 2oz of Centennial at 10 mins, I get about 22IBUs, however if I put another 2oz in as a steep/whirpool it is nearly 40IBUs.
First I have seen this as I never get much for IBUs on late addition hops, and usually just get the aroma and flavor.
I feel like I am missing something as to why it is throwing the IBU calculations out of wack.
Keep in mind I have no idea what the alpha acids are in either of these, and just going by what is default on Beersmith.