Thanks for all the replies.
I took my new-ish CZ550 FS 9.3X62 (~20.5 inch barrel; 1:9.5 twist) to the range yesterday with a variety of loads. I used new resized Lapua brass and WLR primers for all. All screws were tightened to spec using a FAT torque wrench and the rifle cleaned every three rounds. Distance was 50 m, and 3 rounds per load were shot. In general, I was unable to get anything smaller than 0.8 inches with 250 grain Accubonds using Varget, and in all cases groups were strung vertically and in many cases larger than 2". In contrast, I had some very pleasing cloverleaf groups using 286 gr Noler Partitions with 59.5 gr of Big Game (0.2 "; COAL 3.291; chrono 2185 fps), 55 gr Varget (0.4"; COAL 3.317; chrono 2189 fps); and 57.5 gr RL15 (0.57"; COAL 3.291; chrono 2240 fps). Norma oryx factory loads also produced a lovely cloverleaf (0.4"; COAL 3.21; chrono 2250 fps).
I'm wondering what others have found with 250 grain Accubonds with respect to accuracy. Perhaps the Accubonds are not stabilizing in my rifle?
Thanks again!
