Ok I just got done with my first partial mash and it didn't go too bad. I did 4lbs of pale malt and 1lbs of crystal with a batch sparge. I did the first sparge and the gravity was still at 1.025 so I did another it lowered to 1.020. I added enough water to bring it to 6gals, assuming I would lose at least .5gal in the boil, and took a reading at 1.018. I stopped at that point and went to the extract portion with 4lbs of DME.
After I finished the boil, cooled it down and took another reading it was at 1.060. My calcs told me it should be at 1.050. What wrong? From my reading at 1.018 my mashing is at a 50% efficiency and with the final reading, assuming the DME adds 0.034, its closer to 70%. Also I made the temperature correction when I took the reading at 138F.l
I guess what I'm asking is, since its my first PM can I assume I'm getting 70% or 50% efficiency?
Also when people say to quit sparging when the gravity reaches 1.010 are they making the temp correction?