Will I see a difference between these in my Bartlein 1-10 barreled Savage 30/06 at 400-600 yards?
Honestly, which ever one shoots smaller groups at 100 will be the better one at 600.
I've used both in 308win and can't say one is better than the other, but the 190 liked it above 2,700 fps.
For the good ol ought SIX, I would definitely start with the 190.
Following powders would be best in my opinion...
H-4350
Hybrid 100-V
RL-16
N-150
N-550
IMR-4451
and maybe H-4831sc
Good for low pressure M1 Garand type loads, but too fast for modern pressure loads. You will pressure out before you see top velocity.How does IMR 4064 do?
How does IMR 4064 do?