I've been searching for load data for this powder/cartridge combo and haven't found much. I'm gearing up to load my AR 300 BLK and what I have on hand is some 2400 powder, CCI400 primers, 150grn Remington Core lock bullets and plenty of brass. Does anyone know if this powder will work for this round? I also have some 125grn bullets and IMR4198 powder to use. Any help would be appreciated. Thanks