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LAST EDITED ON Jan-17-18
>AT 07:37?AM (MST)
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>.308, 150 grain Nosler, 46 grains
>powder, 2958 fps, B.C. .387...@400
>yards, 300 yard zero, 11.63
>inches drop, 1406 energy
>
>6.5 Creedmore, 140 grain Nosler, 36.5
>grains powder, 2635 fps,.490 BC....@
>400 yards, 300 yard zero,
>13.65 drop, 1189 energy.
You're a little high on your .308 velocity, and a little low on your 6.5. Put them at the factory rating of 2820 for the 308 and 2700 for the 6.5 I bet they are almost identical.
Run the numbers farther out, say 1000 yards for shooting steel. The 6.5 will need 20-30" less wind lead than the .308 in almost every case. Bullet drop is not as big of a deal as it used to be with current rangefinders and scopes, but wind drift is still an inexact science.