As everyone has stated - more than enough. Kilbuc is right, the 140 only starts out faster. If you look at the charts, the 160 will pass it up downrange and give you the additional weight. I used the 160 Partition for many years on everything in a 7 Rem. Mag. and feel it is the best weight for that caliber. I used the 140 Accubond out of a .280 with handloads at 3200fps (yes, chrono'd and safe in my rifle) on a heavy Colorado billy goat right at 300 yards this past fall. They are known to be a tough animal, but with both lungs gone took two steps and fell over, never to move again. Similiar with deer, elk, and moose. Always the same result when shot through both lungs. As long as you do your part, you can have confidence in that bullet.