First AG with new Barley Crusher and 48 Qt MLT. OK I figured Palmers way @ 27.5 on efficiency I guess. What would that be % Wise. I Mashed 13 lbs. of grain and had target temp problems so I collected 10.5 Gal. and I'll be boiling for ever. Had 1.034 SG. @ 61 F. what's my Efficiency %? What's the Formula? Thanks for your input.