I have brewed a Imperial Oatmeal Stout that had a OG of 1.103 it is now down to 1.060 I am going to repitch some yeast. Should I oxygenate? I use pure oxygen with a .5 micron stone.
When I use the Refractometer Calculator in the tools it comes out at ABV 7.45. When used in my brew log it comes at ABV 6.96. Using all the same numbers . What gives?