With the 270 (spent more time with it) it was with Hornady 130gr RN and IMR4350.
With the 243 it was HRN2410 70gr SP and 42.5 IMR4320 powder (experimented up and down a bit)
With the 270WSM it was Winchester (IIRC) factory loads.

I am fairly experienced from the bench and using bags and have shot 1/4MOA groups before (a CZ 527 17HMR). I built a rifle (not Savage) I can reliably (rarely bigger or smaller) shoot .6MOA 5 shot groups with. I would think that I could build a Savage that would do the same or better with money invested, but I was hoping for stock rifles to do this based on much of what I've read online.