Hodgdon has data for both of those bullets with the creedmoor. Twist rate, barrel length and primer data included.To all 6.5 creedmoor shooters using staball match and staball 6.5 using the 143 grain eldx and the 147 gr. eldm how many grains are you using for each load and the velocity of each and please include your barrel lenth and twist rate. need this information to work up for my deer hunting season. Thank You. PM Me with info.