sorry....my original gravity reading was higher than anticipated. Root cause (I think...) was that I ended up short on my total volume...
I guess my confusion is what exactly the definition of "efficiency" is...? My layman's perception is essentially getting the most out of grains you are using based on a theoretical yield of the grain...
And....specific gravity is a convenient (or only...) method of collecting data to substantiate this measure?
Now I think we have ventured off the original intent of this post, but I am still interested if I am thinking of this correctly...