I'm closing in on around 50 BIAB batches and my mash efficiency is pretty consistent around 81% using a full volume/no sparge/squeeze method. The exception to this is when I have a wheat-heavy recipe. Observed mash efficiency drops to around 60%-65% if I am around 50% wheat.
All my grain is double-milled (either once at LHBS and once at home or twice at home).
I have my mill set very fine (0.030").
I do single infusion mashes for 60 min with mixing at 20/40/60 min.
I use brew'n water to calculate the appropriate additions for a pH of 5.4. (That being said, my pH meter broke a bunch of batches ago and I haven't replaced it.)
Short of assuming a crappy efficiency and adding additional wheat to the bill, is there anything obvious I am missing?
I can try a longer mash time but will have to deal with greater temp drop. I'm not sure if that would be a net gain or not.
All my grain is double-milled (either once at LHBS and once at home or twice at home).
I have my mill set very fine (0.030").
I do single infusion mashes for 60 min with mixing at 20/40/60 min.
I use brew'n water to calculate the appropriate additions for a pH of 5.4. (That being said, my pH meter broke a bunch of batches ago and I haven't replaced it.)
Short of assuming a crappy efficiency and adding additional wheat to the bill, is there anything obvious I am missing?
I can try a longer mash time but will have to deal with greater temp drop. I'm not sure if that would be a net gain or not.