I have custom made Tikka 264WM 660mm barrel,8 inch twist, light contoured with cannels. Now I shoot 160 gr Hornady RN on 970 m/s and almost 5000 J energy. Accuracy half of MOA. I used it only for hog hunting for max 200 meters. With thermo scope is superb hogkiller, flat shooting hammer.I have some other good loads with long range bullets. My opinion is- super caliber easily reloadable, light recoil and very accurate hunting cartridge.