So, I've had an American brown ale in primary for about 10 days so far (recipe below). Decided to check its gravity reading (actually, an adjusted refractometer reading) and it seems pretty high. Started with an OG of 1.056 and am reading at 1.017 w/ 5.3%abv (refrac. reading of 8.2B converted to those numbers). That's an apparent attenuation of ~70% using US-05. Every other time I've gotten 80-85% attenuation...
My only guess at the moment is that the mash was warmer than when I normally use US-05 (156F compared to 150-152F). Could that really make me drop 10+% attenuation? Seems kinda dramatic...
Given that it's been 10 days, I imagine it's done fermenting (though plan to leave it in primary for a 3 weeks total); it's pretty clear with most stuff settled. I suppose there's an off chance that it's still working its magic (sight unseen) but I don't believe that. Anyone have a similar experience like this? I'm okay with something like this being slightly on the sweeter side, but 1.017 is just a bit too much, especially without the extra ABV (was expecting somewhere around 6-6.25%)
3 Gallon batch
60 min mash
156F mash (strike was a bit too warm but settled to 156 with grain and some stirring)
60 min boil
OG: 1.056
Grain Bill
2 Row - 4.25lb (68%)
Munich - 1.5lb (24%)
Crystal80 - 0.25lb (4%)
Chocolate - 0.25lb (4%)
Hops
Cascade - 0.4 oz @ 45min (20IBU)
Willamette - 0.3 oz @ 15min (5IBU)
Cooled to ~70F in ~15mins
Pitched 1 packet of US-05
Fermented in room temperature ~62-65F
My only guess at the moment is that the mash was warmer than when I normally use US-05 (156F compared to 150-152F). Could that really make me drop 10+% attenuation? Seems kinda dramatic...
Given that it's been 10 days, I imagine it's done fermenting (though plan to leave it in primary for a 3 weeks total); it's pretty clear with most stuff settled. I suppose there's an off chance that it's still working its magic (sight unseen) but I don't believe that. Anyone have a similar experience like this? I'm okay with something like this being slightly on the sweeter side, but 1.017 is just a bit too much, especially without the extra ABV (was expecting somewhere around 6-6.25%)
3 Gallon batch
60 min mash
156F mash (strike was a bit too warm but settled to 156 with grain and some stirring)
60 min boil
OG: 1.056
Grain Bill
2 Row - 4.25lb (68%)
Munich - 1.5lb (24%)
Crystal80 - 0.25lb (4%)
Chocolate - 0.25lb (4%)
Hops
Cascade - 0.4 oz @ 45min (20IBU)
Willamette - 0.3 oz @ 15min (5IBU)
Cooled to ~70F in ~15mins
Pitched 1 packet of US-05
Fermented in room temperature ~62-65F