Better than usual efficiencies with this brew, don't know if it was the grind or me double sparging the grain. I poured half of my sparge water @170 deg. and let it stand 15 mins. and then vorlauf. Then last half of sparge water I trickled @170 deg. over the top of the settled grain bed into the boil pot. I'll try this method again and see if this was the cause.