The BC is down around 0.038 when they're going 860 but up to 0.048 if they're pushed to 910-915
I also need to do some research to see if I can figure out how to correct the Cd to current conditions, ala, "The Drag Coefficient (Cd) is dependent on the air density, and must be corrected to standard pressure and altitude before used to calculate the BC.... The velocity must be changed from fps to Mach number, before comparing the Cd to that of the drag model used to calculate the BC...."