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Okay, since I don't have enough brews down with the same equipment to trust projected efficiencies, I take pre-boil gravity to make sure I've got hop additions and know what to expect in terms of OG into the fermenter.
I've run across this enough times that it's a pattern and not just a fluke...the reading I get after mashing and gathering wort is high by 5 points or so. If I plug the numbers into a calculator, I'm seeing a much higher OG than predicted. I do the boil, check the gravity, top up to fermenter volume if that's part of the plan and get the OG. That comes out much lower than the pre-boil gravity reading would predict. So my pre-boil gravity reading is consitently higher than it should be according to every other aspect of the process.
I measure volume before boiling and I make sure to stir the wort a lot as it's heating to make sure it's mixed and I wait until it's nearly boiling to get a gravity sample. I cool it off (ice bath, etc) to close to the hydrometer temp.
What else can I do to get a good reading? is waiting until it's actually boiling really going to make a difference?
It seems to be a common issue and when it comes down to it, I'm getting the OG and FG numbers I'm using to build the recipe, so I can ignore it, I suppose, but it it would be nice to be able to figure it out.
Any thoughts?
Thanks
I've run across this enough times that it's a pattern and not just a fluke...the reading I get after mashing and gathering wort is high by 5 points or so. If I plug the numbers into a calculator, I'm seeing a much higher OG than predicted. I do the boil, check the gravity, top up to fermenter volume if that's part of the plan and get the OG. That comes out much lower than the pre-boil gravity reading would predict. So my pre-boil gravity reading is consitently higher than it should be according to every other aspect of the process.
I measure volume before boiling and I make sure to stir the wort a lot as it's heating to make sure it's mixed and I wait until it's nearly boiling to get a gravity sample. I cool it off (ice bath, etc) to close to the hydrometer temp.
What else can I do to get a good reading? is waiting until it's actually boiling really going to make a difference?
It seems to be a common issue and when it comes down to it, I'm getting the OG and FG numbers I'm using to build the recipe, so I can ignore it, I suppose, but it it would be nice to be able to figure it out.
Any thoughts?
Thanks