Specific Gravity Puzzlement

[Brews Brother]

Hey, friends,
I brew a variety of all-grain beers in the Marzen, Fest, IPA, Pale Ale, Bock and Belgian categories, among other things. Despite a variety of calcuated F.G.s ranging from 1.012-1.015, I always come in at 1.010-1.012, so my final ABV always seems to be a little higher than expected. My O.G.s are generally on target with estimated gravities or a little lower.

Any possible explanations for this? I don't really have any complaints about the outcomes, just curiosity about the measurements.

 

[Nosybear]

Attenuation? I think Brewer's Friend uses standard values for attenuation, yours may differ. Are your beers coming out "dry" tasting? If so, you're likely getting better performance from the yeast than advertised.

 

[Hogarthe]

are you sure your mash temps are correct? if your temp is a bit lower than you planned, you'll end up with a more highly fermentable wort.

 

[Brews Brother]

Thanks for the ideas. I mostly use yeasts from Fermentis unless I'm shooting for something more esoteric, and I note that they really kick in actively very quickly, so attenuation could be one influence. My mash temps are reasonably well dialed in around 152-154 and I rarely go below that. Maybe I'll just pat myself on the back, kick back and enjoy a homebrew. :lol: