What specificity did you want?
Looks to me as if you should use a sweet spot close to that suggested for the bullet weight you're using. None of them are gonna be exact because pressure curves are not identical across all ammo lots for a given make, caliber, bullet weight and type.
And no two people shoot the same load out at the same velocity with the same barrel anyway. Plus not two barrels of the same make and bore profiles shoot the same load at the same velocity. So there's no way Browing's suggested setting for their A Bolt .30-06 rifles wil be the same for everyone and every rifle.
Shoot at least 10 shots per test group so they'll have reasonable levels of credibility for the accuracy attained.