In my TC precision hunter, I use Nosler brass, 39BK, 205M and TAC. 8208XBR also works well and gives about 75 fps more. I get 5 shots under 1/2" consistently. Be sure to try different primers once you get the charge weight where you want it. I tried 7 1/2, 205M, WSR, and BR-4. The 205M brought the group size down as much as tuning the charge weight. I also seat way out to mag length, 2.39" OAL.