BMR: I know the question is for the DGX. But thought the following would be of some interest. Through the years I have loaded a bunch of Hornady 500gr FMJ bullets for load development. Winchester M-70, Winchester brass, Fed 215 primers, and the following three powders: 74.5gr H-335=2118fps, 75.0gr AA-2230=2224fps, and 74.0gr H-4895=2205fps. Five each of these loads were shot over the screens @ 12' and corrected to the muzzle. Altitude: 8100' and temp: 78F.
My rifle(24" bbl) seems to prefer, regardless of which bullet and powder, a velocity of 2185fps. Some combinations were a bit more accurate, but on average, the magic velocity was/is 2185fps.
Good luck with your load development.
