I did my first all grain brew yesterday. Double chocolate oatmeal stout. Milled my grains (had to setup mill) and found there was a fine line between flour and not crushed. I compared my milled grain to pictures online. It looked to fine while crushing but cleaning out my mash tun after looked not milled enough. I think this is the cause for my low efficiency. Mash temp held perfectly for the hour, mash/sparge volumes were bang on! Boil was great. I ended up with almost 3/4 of a gallon more in my fermenter than I wanted but that's bc I over estimated my losses in beersmith. At 61% the abv should still be are 4.5-5%, but I'm more focused on taste and drinkability. Time will tell. I'm going to study up on milling grains and also the draining speed from my mash tun to boil pot. Mash gravity was [email protected] and preboil gravity was [email protected] My next brew is an IPA, I might buy a small bag of pale DME incase my preboil gravity is low again. Good idea? Any other advice for the newbie?