75 grains of CFE223 behind the Hornady 480 Gr DGS all on top of Federal 215 primers at 458 win magazine length. What velocity would be expected?
Sir John, I am going to guess that would duplicate classic 450 NE ballistics in the 2150 to 2200 fps MV range with a 24" barrel. Pressure would be quite low, plumb tropical. CFE223 is pretty slow for the .458 WM but energetic and cleans the barrel nicely, and your brass would last forever. QuickLOAD is quite useless in dealing with a .458 Winchester Magnum throat. Proof is in the tasting of the pudding. Have you chronographed that load yet ?
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.
