I have a 6.5-284, which not the same, but with the 140 A-MAX it shot the same as the Sierra, with clover leaf groups, loaded for 2950 fps useing IMR4831 at 44.0. Shot the chrony so I have no clue as to actual fps. This powder or similar. I looked up the loads in the Hornady manual and they are way off the end. Start low and you know the rest. I know I saw no problems with this load, and will continue along this path.