Re: 6.5 Creedmoore Brass?
The pressures that factory 6.5 CM runs at promote long brass life. The box published load shoots really well in a lot of rifles and is about 53.5ksi for the standard published chamber.
At this point I see no reason to go through the hoops of forming brass unless you can't find it at all. The Hornady stuff for me is shooting great. The first rounds I put through my rifle were just the 140 Amax loads published on the back of the box, they were shooting sub 1/2 MOA at 600yd. With a little tuning the rifle is shooting even better, the only brass prep I did was to run the cases through the case mouth chamfer, and load them up.