Favourite powder for .260 with 142 MK?

[redmist25]

What's your favourite powder for your .260 with 142 sierra match kings? Going to be building a load for silhouette and would like a powder that meters well through my redding measure.

 

[todbartell]

here's my data, I dont suggest trying these loads in your rifle without proper load development.

142 gr

-Sierra MatchKing @ 2.845", 44.5 grs. H4831sc, F210M ~ 2630 fps

- Sierra MatchKing @ 2.845", 45.0 grs. H4831sc, F210M ~ 2651 fps

- Sierra MatchKing @ 2.845", 46.8 grs. H4831sc, F210M ~ 2773 fps

I have more loaded up @ 46.2 grs H4831sc, but have yet to test them. My rifle is a Gaillard barrel 1:8 twist 23" long.