My go to .270win load for well over a decade (using same criteria you note) is 130gr Nosler Accubond & AR2209. Mild pressures, good velocity, consistently accurate and smacks over everything it hits.
I have a backup go to load using 130gr Sierra Gameking & RL22 which is very accurate and a relatively economic load to make.
Have always planned on working up a load using 140-145gr projectiles (like the 1240gr Nosler BT), but have never had the need given how well the above loads perform sub 400m ranges.
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