Today i ran a batch of scottish ale using the countertop partial mash technique from byo. I only got 46 percent efficiency from the grains.

I used 1.75 lbs of 2 row base malt, .6 lbs of crystal 40, .3 lbs of honey malt, .15 lbs of crystal 120, .11 lbs pale chocolate.

I placed the grains into the grain bag and mashed in at 169 to get a temperature of 158. Using 1.375 quarts/ pound of grain. Turns out that when i put my thermometer into the mash it only showed 154. It sat there for 30 min. About 15 min in i checked the temp and it was only 146, so i added 1 cup of boiling water to get it back into the 150's.

I sparged with the same amount of water at 175. Letting it sit 5 min before i drained the cooler the second time.

Doing the math i only pulled 48 points out of a max of 105. Can anyone see what i did wrong to only get ths 46% efficiency