Good work.
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2350 fps with the 450-gr CEB Brass FN Safari Solid is a nice load for any 24"-barreled .458 WinMag:

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Are you using Redding dies on the .458 WinMag ?
FL sizing with those resulted in wasp-waisted loads for me.
Using RCBS FL sizer does not squeeze down the .458 WM brass as much and makes a prettier load.

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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.