:-\ I have a 280 AI with a pre 64 mod.70 action and shilen barrel,it will shoot 140 gr. bergers very accurate about an inch at 200yds. with a 16x burris extreme tactial scope.but i cannot find a load it will shoot with 168gr bergers. i have shot about every powder for the caliber and cannot get under 3 in. at 200yds. any one else have this problem two of my shooting partners are having the same trouble. is it just the caliber i have never had so much trouble getting a gun to shoot.bedding,trigger,crown are all good