The 6.5 needmoor. Was designed to shoot 600 yds. it was made for HP shooters, for X course. 2-3-600 yds.
If you want speed, rechamber to a 260 AI, or better yet, Shoot a 6.5X284 with your 140's.
Or only shoot 130 gr pills. you can get almost 2900 with 130's
at 2650 fps, you might as...