I did some testing today with various bullets. I used Lapua brass with RL17. The brass was all once fired that had been neck sized and the same charge was used with all bullets. The 130 Berger, 120 Barnes, and 140 Nosler had .020 jump. The 140 Hornady and 140 Berger were jumped .050. These were the average velocities: 130 VLD-2870 140 VLD-2800 120 TTSX-2960 140 AMAX-2855 140 Accubond-2875 I also need to add that this rifle has a 9 twist 26" tube. The VLD bullets are noticeably slower and I just wondered if this is normal?