So I decided to brew a Dunkleweizen last night after work so its ready for a local competition in January. Have my work's Christmas party this Saturday and figured I'm not going to be able to do it Sunday Not the greatest decision as it was -6C with crazy winds blowing and had a bitch of a time keeping temp and waterlines from freezing. 10.88lb grain into 8.07gal water at 151. Dropped to 149F after mash in and wrapping kettle. Checked after 20mins and it was down to 148. Unwrapped, gave a good stir and re wrapped. After another 15 it was down to 142 so I gave her some heat back up to 152 (over shot by 2) and rewrapped for a total mash of 90min. Preboil amount was bang on at 7.35gal but gravity was 1.070! Conversion of like 144.4% How the heck can this be? I checked both hydrometer and refrac and they were within 2pts even with temp correction. After the boil I was expecting something crazy for an OG but ended up getting 6.5gals @ 1.040. I missed my target by 7pts but was about a gallon over as it was supposed to be 5.5gals so that probably works out. Can only presume the cold and the wind buggered up my boil off rate and didn't want to extend boil though I think I should have to bring up the OG. End of the night it kinda worked out and it bubbling away this morning but can't get my head around the 1.070 preboil gravity. Anyone have a thought on this? Could it have been the goofy mash temps? 5.5lbs of wheat?