BLC-2 is my favorite powder. I use it in the 223 and 6mm PPC. The 223 bolt action likes the 55 grain Sierra spitzer BT the most. I was kind of surprised and expected the match bullets to do better but they didn’t with it. I use 27.1 grains of BLC-2. It’s not the max load, but anymore and it loses a little accuracy. The 223 AR hates it and likes TAC and CFE 223 more.