Is there an online almanac of sorts for hop alpha-acid percentages in the past?

[eddiek85]

Just wondering because a recipe I tried to put in for Punk IPA showed IBU ratings that were significantly lower than what I was getting in brewsmith when I input the hops with current AA%. I'm getting 110IBU in Brewsmith but the actual beer is only 45IBU while the recipe. The recipe is from 2010, but the closest thing I could find were the AA% for 2009. I modified the recipe using the '09 AA% instead of 2016 and immediately it dropped by almost by half. I wasn't able to find the '10 AA% and was hoping I could use those to bring reasonably closer to factory IBUs.

Thanks for the help!

 

[brewcat]

What hops? Maybe somebody has it in their notes. I started keeping AA% in my recipe notes. I don't think I did in 2010 though.

 

[eddiek85]

I need the percent for Chinook and Ahtunam. *Fingers Crossed*. I'm kinda surprised producers don't have this on hand. Maybe if I email them they would know.

 

[MrBJones]

Based on my purchases of hops, the AA% varies; the % for a specific batch of a certain type will be within a certain range. I'm looking at two packages of YCH Hops, both East Kent Golding, one is labeled 4.8%, the other 5.5%. Look HERE for info.