Barrel is a 1-13.5 bartlein. I have 66 grn barts, 68 grn berger and 70 SMK. For powder I have varget, 8208, H4895, benchmark, and BL-C2. Brass is lapua fired once and NSed with a redding bushing for .002 neck tension. I fire formed with 8208 and 68 berger, 10 thou jump, mediocre accuracy. I bought the 8208 for this rifle but since I bought a pound of it I have heard some rumblings about it being overhyped and finicky. What seems to be a popular powder for these bullet weights? Thanks in advance