That should get you to a mile.
I was shooting to 1800 yards with another forum member a while back. I was shooting 208 Amax from a 308, he was shooting 140 Amax from a 6.5 Creedmoor.
We were both hitting, with almost the same dope. My BC advantage, and his MV advantage kind of equaled out.
We were at about 4300 ft, 60F.
