So I finally brewed my first AG yesterday and it was awesome! All the new equip worked great except my sparging if I am correct in my findings. When I tried to figure my efficiency it came out to 55%? Am I doing this right? Pre boil was 1.046 and total potential gravity was 83 gravity points. I ended up with 6.5 gal of 1.060. So 46 GU / 83 GU = .55 or 55% eff. I am a little dumbfounded by this and hope I am doing something wrong here. The bill was for an IPA with 15.5 # of grain. Please help.
Orfy that's what I ended up with at the end of my boil. I was shooting for 5.5. My pre boil vol was 8.5 gal. at 1.046. 90 min boil. my recipe was= 10 # 2 row, 3#vienna,.5# biscuit, 1# 10 crystal, 1# wheat malt.