What efficiencies can I expect from the G40? Abby October 14, 2021 20:57 Updated This depends a lot on your grain bill, grain crush and recipe. Our overall testing has yielded efficiencies between of 70-80%. Related articles Technical Specifications - G40 What batch volumes are achievable on the G40? What grain bill is achievable on the G40? Instructions - G40 G40 - Anatomy Diagram & Parts List