Originally Posted by bigcountry

That doesn't tell the whole story.

One, a 7mm 160gr accubond has a SD of .283 which trumps a .308" 180gr accubond with SD of .271. Means it penetrates better therorectically.

With a 7mm rem mag with a 160gr accubond launching at 2950fps drops less than a .308" 180gr accubond launching at 2950fps. Both velocities are realistic values.

The .308" 180gr accubond has a BC of .507 and the 7mm 160gr accubond has a bC of .531. Which translates to 2" gain in performance to the 7mm at 500 yards, and 23" at 1000 yards.