What is an accurate BC for the 147gr ELD-M out of a Creedmoor?

[Winny94]

Hornady site is showing .351. Coming out at ~2725 fps, is that an accurate number? Also, JBM is showing a length of 1.440" is that correct enough as well?
I have limited time at the 500 yard range tomorrow, and trying to make the calcs as accurate as possible right away.

thanks

 

[Niles Coyote]

If you go to
https://www.hornady.com/support/ballistic-coefficient

They list the velocity/range bands and G1& G7 which I have found to be nearly spot on. if your shooting to 500 use .332g7