I need some help figuring out what is going on with my gravity. For several sessions in a row I've measure very good pre-boil efficiency taken as a sample from the kettle after sparging. However when I complete my brew day, my final sample is only a few points higher than the pre-boil. Given the boil off it makes no sense that the gravity isn't increasing more.
In my most recent brew session I changed my process a bit on the mash side and ended up high on volume: 7.2 gal at 1.057. I boiled long (before hopping) to get my volume down. After boiling and losses from 9oz of hops I had 5.5 gal at 1.060. I saved my pre-boil sample and tested it multiple times to ensure no temperature issue. My final gravity was measured with both my refractometer (also used pre-boil) and my Tilt.
I'm at a loss for what is going on. Any thoughts?
In my most recent brew session I changed my process a bit on the mash side and ended up high on volume: 7.2 gal at 1.057. I boiled long (before hopping) to get my volume down. After boiling and losses from 9oz of hops I had 5.5 gal at 1.060. I saved my pre-boil sample and tested it multiple times to ensure no temperature issue. My final gravity was measured with both my refractometer (also used pre-boil) and my Tilt.
I'm at a loss for what is going on. Any thoughts?