Recipe adapted from:
Direct fire Hochkurz mash: 145ºF for 40 minutes. 158ºF for 20 minutes. Mash out at 168ºF for 10 minutes. Batch sparge, drain 100% then add sparge water at 180ºF, should even out at ~168ºF. Use a 4 L stir plate starter, decanted before pitch. Oxygenate w/ pure O2 for 90 seconds. Pitch yeast at 48ºF, set regulator to 50ºF. Then follow this schedule: 2 days after pitch set regulator to 55ºF/12.5ºC 4 days after pitch set regulator to 60ºF/15.5ºC 6 days after pitch set regulator to 65ºF/18.5ºC 12 days after pitch set regulator to 32ºF/0ºC. 13 days after add gelatin 14 days after pitch transfer to keg and carb.
https://www.homebrewersassociation.org/homebrew-recipe/malty-boye-helles-bock/
Doughed in with just shy of 7 gallons (~6.8 gallons) @ 145F.
Let stand for 10, then circulated for 5. Then pulled the grain basket drained it and resubmerged.
Then stirred it up, let it sit for 5, recirculated for 10, then pulled the basket again. Did this 3 times @ 145, then bumped to 155 did this twice, then brought up to 168 then pulled basket for the mash out.
Sparged 2 gallons over the grain basket.
Pre boil volume was just shy of 7.5 gallons.
Boiled on 95% power for 90 minutes.
OG: 1.058 Hyrdo 1.056 Refrac