I like several AA powders but 2520 has been inconsistent and never really worked in anything for me including the 5.56. There are too many choices for me to put much sweat into building a 2520 load.
This is why we quit it in the 90s. It was 200 fps slower and not accurate all of a sudden, this after we'd shot it for years and probably close to 50 pounds or so of it....
