kyre,
I did have to use Litz's G7 for the Scirocco to have reliable data past 1000 yards, but out to 1000 the published BC of .571 was on.
BTW, the G7 is .251 average.
The 140 grain A-Max (which I shoot in the Creedmoor) has a G1 of .585 according to Hornady. Pretty close to the heavily constructed/bonded Swift hunting bullet which is meant for heavily constructed Fur.
