I been running Accurate 4064 and its been working great. I run it with a CCIBR2 pushing a 212 ELDX at 2470 out of my 26 inch Howa. Load shoots .8MOA. out past 600yards. I don't know the temp stability on this yet but I developed it around hunting season. I'm going to try and tweak the load some more this winter with seating depth but I really don't want to loose any velocity. I thinking seating out longer, and if I get a reduced group size then try and adding a small amount of powder to keep velocity the same and I mean small. I'm thinking like counting the kernels. I don't know if I will need to change the powder charge but I figure with increasing the loaded length the size of combustion area changes a bit so it will need some slight tweaks also. Generally about 4 kernels equal 0.1 grains is what I've seen.
