DME priming attenuation

[Bear419]

Low on corn sugar so I am going to prime with DME, but am confused on how to perform the calculation to get the right CO2 volume. Most calculators I see have a couple choices of for the apparent attenuation of the DME. Is the AA based on the brand, my process, or my yeast?

I am using briess extra light DME.

 

[Hammy71]

The Golden Light DME from Briess has a fermentability of 75%. I'm sure the extra light is pretty damn close to that, probably the same. I think it's probably based on the brands processing.

http://www.brewingwithbriess.com/Assets/PDFs/Briess_PISB_CBWGoldenLightDME.pdf

Calculator that you can use too. After you put in the information, it will give you several options. One of them is 75%AA DME:

http://www.tastybrew.com/calculators/priming.html