Ok here is the set up.
I have traditionally hit and usually very slightly exceed the expected OG (one or maybe two points). I had been using my blender for grain “processing” (I won’t start the argument as to whether this is crushing the grain . I found a corona mill for VERY cheap and it grinds grain like a champ. I had honestly expected to see a drop in my OGs as the corona simply does not pulverize as much of the grain as a blender does. Instead I have a interesting jump in my OGs. Cream ale (expected - 1036, actual - 1040), Sierra madre PA (expected - 1048, actual - 1054), and the wower Extra PA (expected - 1037, actual - 1050). I have checked the calibration on my (both) Hydrometers (heck I am a chemist, I did think of that). I am at a loss to explain my elevated OGs. I cracked the 1st cream ale saturday. It is fine if a tad dryer (again unexpected) than the only other batch of cream ale I have brewed (it was blendered).
I am kinda in a WTF mode. I suppose I can just accept that my effeceincies are high and not wonder why … but … did I mention I am a chemist? It is bugging the crap out of me as to why? I know I can just cut my grain bill slightly if I want to correct but I would like to know what I am correcting for.
The only thing I can think of that would have had any infuence on the OG was that I did add 3% Acid malt as I built the water up from RO water. But I don’t see a 3% malt addition bumping the OG up like I have seen.
Any suppositions or solutions welcome.