I think you will find more accuracy when you find the COAL your rifle likes best.
Most factory .270s have llooong throats to accommodate the 160gr class round nosed bullets.
Find the lands and back off the length to around .020"-.050" off, and work up the load from there. Keep your magazine length in mind.
My COALs are way out there now, but man does she shoot! More velocity with less pressure too.
Good luck, be safe and have fun.