What efficiencies can I expect from the G40? Abby November 29, 2022 00:20 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? G40 - Anatomy Diagram & Parts List Instructions - G40