So I finally got to try out my new AG equipment and my efficiency was horrendous (63.5%). Hoping someone can see what might have caused it. I brewed the Dead Ringer all grain kit (11lbs Rahr 2-row and 1lb C40). The crush looked exactly like all the pictures I’ve seen of grain considered a good crush. The grain was crushed about 2 months ago but was kept in double plastic bags so I don’t believe any moisture got to it.
I used brunwater to determine pH and was calculated at 5.4 at room temp. I heated my strike water (5 gallons) to 175 and poured it into my 70qt cooler and closed it to preheat it. This brought it down to about 165, then I doughed in and my temp went down to around 158. My target was 152 so I poured about half a gallon of 120* tap water and hit my target almost dead on.
After 1 hour I vorlaufed and drained the mashtun. I got 4 gallons of run off so I added 3 gallons of strike water at 175*, stirred like crazy, vorlaufed and drained again. Then something weird happened. After completely draining the mashtun I only got 2 gallons of run off. I’m not too sure where the other gallon went but the mashtun was drained. I heated 4 gallons of sparge water so I added the final 1 gallon and repeated the sparge process to get my final 1 gallon to put me at 7 gallons.
This yielded a wort of 1.040 which according to
is 63.49% efficiency.
After the boil I was at 1.049 so I added about 0.75lbs of sugar to get me closer to my 1.064 target OG. I didn’t have any DME on hand so hoping It doesnt come out too dry.
So any thoughts on what could have caused such a low efficiency?