I haven’t used it a bunch, yet, but so far I’m seeing good accuracy with 73gr ELDM and 77gr TMK bullets in the .223 with StaBALL Match powder.
From what I remember, the ES and SD numbers were good, too. I’d have to check my notes for the particulars, though.
I’m interested to know the details especially velocities, ES and SD!
Sorry for the late reply.
It looks like I have only tried StaBALL Match out of my Christensen MPP, with 10.5" barrel, so far.
With the 73gr ELD my numbers were:
23.5gr gave 2234fps an ES of 52fps.
24.0gr provided 2285fps, with an ES of 44fps.
With the 77gr TMK:
23.5gr was 2220fps and 26fps ES.
24.0gr generated 2271fps with an ES of 32fps.
By way of comparison, a previously worked up load 23gr of TAC gave me a velocity of 2275fps, with the 73gr ELD, and provided an ES of 69fps.
All of these numbers came from my Garmin Xero, with 5-shot groups, all shot on the same day.