With your 6.5-300, I’d stick with a bonded or mono. Often times shots are taken much closer than we gear up for.
For fun one day, I shot my 6.5 with the 140 Nosler CC which has a fairly high BC and 140 Nosler Partition which does not. With the same velocity, both rounds hit 10” steel plate at 600 yards with zero elevation change in the scope. I don’t know where the higher BC comes into play, but its likely beyond my ability to make a good shot.
For fun one day, I shot my 6.5 with the 140 Nosler CC which has a fairly high BC and 140 Nosler Partition which does not. With the same velocity, both rounds hit 10” steel plate at 600 yards with zero elevation change in the scope. I don’t know where the higher BC comes into play, but its likely beyond my ability to make a good shot.