Turns out it was not a COL issue. I did not set the FL sizer down far enough I guess. Normally it's ok when you set it to just touch the shell holder, I had to crank it down another half turn to.
I did pull a factory round apart. 44 grains of a ball powder. I put it beside some H414 and it's similar, but darker. I know they probably use a proprietary powder, but at least I understand the velocity issue.
I did notice last time I shot the last round in a string I left it sitting in the chamber longer settling in on the target. That shot was noticeably higher than the others.
Regardless, I'll be putting together some test loads today and hope to get a break in the rain tomorrow.
