For a quarter century I loaded compression formed AAs with Win 209s, 296, a WAA-41 and the amount of #9 shot the MEC half ounce bar threw. In recent years I've been loading STS with Remington primer and wad, and Lil' Gun powder. I've found that with the Remington case and wad I could hog out my MEC bar to where it threw a true half ounce of shot.