OK so another necro on this old thread. I'm planning an IRA and I've got the grain bill and hops down to what I'd like it to be. The yeast though...
I see a TON of recipes recommending US-05 as the preferred yeast for this beer. It's been pointed out that S-04 might be a better chance, specially because it is supposed to not attenuate that far. However, I've had numerous ales ferment down to 1.006 with S-04. Yes, they were mashed really low for extended times, but I don't want my IRA to end anywhere near there.
I'm hoping for my IRA to stop around 1.012, down from 1.050 in the recipe I'm planning. For that I want to mash a lot higher, but it still doesn't answer my question.
What yeast would be best for this beer? I'm leaning toward S-04, but I'm not sure.
Oh yes, and as another PS, I also haven't experienced this rapid dropping clear with S-04 as explained here. And I've made a ton of beers with S-04 lately.