My gravity into the fermentor did not match up to the gravity in the kettle.
7.47 gal into kettle. I took multiple refractometer measurements here. First was 1.051. 2nd check was off, at 1.048. So I checked a third time and got 1.050. So I stirred the heck out of the kettle wort and took a large sample of approx 8 oz… from that I took multiple additional refractometer measurements, all of which were dead on 1.050. So I attributed original measurements to incomplete stirring after the batch sparge addition into the kettle. Assumed 1.050 to be correct
Post-boil volume 5.5 galons, hit volume dead on. So post boil gravity should have been 1.068.
Instead it was 1.061,
Again multiple measurements, and also verification with the old hydrometer. 1.061.
I filter out hop matter but let the rest of the solids into the fermenter, and this only had 1 oz Warrior bittering so the hop matter made no significant difference in volume.
I’m scratching my head here. Any help?