For my fifth batch, I decided to make the jump into all-grain. So yesterday, I made a rectangular mash tune following the instructions through the wiki and sure enough, no leaks and water drained nice. I followed a recipe out of "Radical Brewing" for a Chocolate Mint Stout. I used the batch sparge method, but think I went the wrong way of doing so. I used brew365 to calculate the amount of water I should use to strike and mash with. 5 gallons was plugged in because that is how much I was going to throw into the fermenter, but now that I'm reading this, I'm guessing it expected me to boil 5 gallons. So what we did was add the water to the mash tun and slowly pored the grains in while stirring. The water was at 150 and we closed the tun and let it sit for an hour. After doing so, we turned the valve all the way and recycled the wort that had some trub in it which came out clear the second time around as expected. We let this all drain out before we pored the other 5 gallons of water at a temperature of 170 while stirring the grain. I turned the valve all the way and then filled my kettle. It seems that I was left with 2 gallons of wart that wouldn't fit into the kettle. The OG was supposed to be at 1.065 but ended up being 1.050. The other two gallons were left out since it barely had a gravity reading. I have yet to calculate my efficiency, but I thinking it wasn't all to great. I did some researching and found that I shouldn't have opened the valve all the way, but instead, let it drain out slowly. I thought this was only for the fly sparge technique. I'm open to suggestion as to what I should have done or what I can do for the next batch. I look at this as a learning experience 
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