Buffalo Bore did show some trajectory charts for the 400-gr TSX and 450-gr TSX at various MV.
The top for the 400-grainer was 2600 fps, and for the 450-grainer was 2500 fps.
Good limits for the sane .458 WM shooter.

Out to 300 yards, the 400-grainer is about 1 inch higher than the 450-grainer,
but has 3.6" of wind drift for the 400-grainer versus 3.3" for the 450-grainer.
The 400-grainer is supersonic to 725 yards, while the 450-grainer is supersonic to 784 yards.
400-grainer muzzle KE = 6003.1 ft-lbs.
450-grainer muzzle KE = 6244.0 ft-lbs.
Less recoil and adequate game-getting for the 400-grainer,
but the 450-grainer is going to be the champion gong-ringer at 1125 yards.

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Ron aka "Rip" for Riflecrank Internationale Permanente
NRA Life Benefactor and Beneficiary
.458 Winchester Magnum, Magnanimous in Victory
THE WALKING DEAD does so remind me of Democrap voters. Donkeypox.