Favorite powders for a 6.5 Creedmoor in an AR10 platform

[DIBBS]

I am getting ready to start load development in an 8 twist 6.5 Creedmoor. I will be using 123-140 grain bullets, and have Hornady and Prime brass. I will likely start with Hornady 140 bthp bullets. Any powder recommendations to start with? Thanks.

 

[gulada97]

Trial and error really. Hogdon 4350 should be a good start.

 

[stello1001]

Varget with the lighter bullets
H4350
R16
R17
R26
Staball

 

[Skg_Mre_Lght]

Varget with the lighter bullets
H4350
R16
R17
R26
Staball

I really like H4350 with 140 ELD-Ms. I'm betting your rifle is going to like around 41.5ish grains in Hornady brass.

I use a JP High Pressure bolt, firing pin, and an adjustable gas block in my 22" Criterion barrel 6.5 to get rid of pierced primers, bolt swipe, and other pressure signs that happens with everything from factory to middle ground handloads. I never had to do that with my 308 ARs.

 

[duckhunter175]

130gr ELDMs and H4350

Also had good luck with the factory 120gr ELDMs

 

[68GT]

Varget and 123s runs best in my 22"

 

[1jonathan1994]

4350 is the slowest I would go for 140gr and up.
Anything under 140gr use Varget.
Your brass, chamber, and lugs will benefit from the fast for bullet powders.
130gr pills and 39gr varget with Hornady brass should be ballpark goal.
Work up to that of course.