i use H4350,140 VLD hunting.cci LR
lierally no ********, 1 ragged hole.
i have killed 3 deer at 500 with this and 2 pronghorn at 425 yards with another good option, varget
my gun likes them at 3.018 coal
i am not as experienced as everyone here but since i jumped in the pool i'm sure the others will help
i would certainly ladder your gun for seating depth
my process:
pick powder and 1 charge
load
3 of each
.005 off ,010 off ,020, .040 , .050
you Will find a node
then fine tune the node in .005 inch increments if necessary ,go to .002
once you have something you feel is worthwhile vis-a-vis depth
then i would use the charge as your starting powder and experiement with .5 grain increments and different powders
i'm sure this is all familiar to you but i truly believe it is good to refresh the basics.
the people on this site have helped me immeasurably and i am simply trying to return the favor
140's in a 6.5 are a deadly combo that works like a hammer close and a missle far
mine likes bergers,accubonds and believe it or not speer grand slams.
it is MY HUMBLE OPINION the depth is more important than powder and charge at first.