This is from Petersons hunting letters June- July '13 by Joseph Von Benedict (of Petersons Hunting).
With the nosler 150 accubond LR, BC .625 at 2900 fps. Vs 180 accubond BC .507 at 2600 fps. At elevation of 5000 ft. And zero at 200 yds the 308 drops 49 in at 500 yds and drifts 17 in with 10 mph crosswind. 270 drops 36 in and has 11 in of drift. At 500 yds it has 307 ft.lbs more energy than the heavier 308.
With the 30-06 with the 180 gr.nosler, 308 at 2600 vs 06 at 2800 fps. Plus, the 30-06 will handle the nosler 190 gr Accubond LR with a BC of .640 which at 2700 fps drops 42 in at 500 yd and has 12 in of drift and yields 474 more ft lbs in energy.
