Just looked up some numbers in the Nosler #7 reloading manual.
180 gr Nosler Partition BC .474 at 2700fps has retaining velocity of 2169fps @ 300 yds. At 400 yds it's 2007fps.
180 gr Nosler Accubond BC .507 at 2700fps has a retaining velocity of 2199fps @ 300yds. At 400 yds it's 2045fps.
The difference in drop with a 200 yd zero is .2" at 300 yds.
So where's the advantage again?
A 200gr NAB, 2600fps at the muzzle, will be going 2035 fps at 400 yards.
The 200gr bullet with 0.588 has caught up to the 180gr bullets and will start to lead from there out. It'll be faster and have an extry 20gr.
