Any significant wind will ruin your day at 400+ yards with slow twists and light bullets.
I’ve had good luck getting the Horn 105 BTHP to shoot in a couple of 10” twist .243s, so I’d start there for what you’re trying to do.
If you’re really wanting to shoot 400+ yards in any wind, pick up a 7 or 8” twist .223 and shoot the 75 ELD. Compared to any of the ~50 gr bullets in .224”, your hit percentage in the wind will go way up.
