Updated 143 gr. ELD-X load after many 5-shot groups to verify. There have been others who've also posted this powder charge:

Bullet: Hornady 143 gr. ELD-X
Brass: Hornady
Primer Federal 210M
Powder: H4350 41.7 gr.
CBTO: 2.038"
COAL: 2.797" - 2.801"

Though taken several cow elk with this load (out of necessity) this is going to be my pronghorn getter next season.

It's you and the bullet, and all the rest is secondary.