I got my barrel today to build my 6mm Creedmoor and I already have supplies to reload so to get started and save time I bought a box of Hornady's match ammo to open one up. The specs are 108gr ELD match bullets loaded at 2.790 COAL, the powder is a little trickier... they have exactly 40.3 grains of ??? Their data on the box list a muzzle velocity of 2960fps and their closest load data using 40.3 grains of powder is 4831SC. I have some 4831SC and they don't appear to have the same color but the kernel size is right. Anybody know whats in there??