So apparently I did a thing last night.
I 'won' a used, unknown history, 8-twist tikka .223 barrel.
It's shorter and threaded. My plan is to remove the long heavy 12 twist barrel from my Tikka 595 and be able to use 75-80 grain stuff in it. The 595 223 magazine will handle 2.42" so my plan would likely be to load something to 2.4". I have a pretty good idea on powders already on hand. I know the 77TMK would work and that's the easy button but since these will be loaded to 2.4" there's a part of me that would like to save the TMKs for use in an AR and load something with a different colored tip for easy ID as being bolt gun loads.
That means 75eldm, 80 eldm, or 80 eldx.
8 twist, most shooting will be at or near 660' elevation and temps could be anywhere from 10 degrees on up. Which would y'all choose as second place to the 77TMK?