Re: Finding the right load for a 30-06
Those aren't necessarily the bullet/powder choices I would've gone with. But, you should still be able to get decent results.
Brass prep, concentricity, primers, etc all have a bearing as well.
Just glancing at one reloading manual indicates that the acceptable range for IMR4064 with a 180gr Sierra SBT is from 43.0 to 49.0gr. So, I wonder if you tested a wide enough range.
Do you know about how far off the lands you are with that COAL?
It seems a little short. I often start my load development with about .010-.015" jump.