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.458 Winchester Magnum Load Data Reloading Data

 
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Warning! Notes: .458 Winchester Magnum Browning Safari 24-inch barrel; Browning cases, 254 grains except where noted; CCI No. 250 primers; Oehler M-31 Chronotach, M-50 photoelectronic screens; velocity instrumental at 15 feet converted to MV; five-shot groups at 100 yards; with all powders used except 4198 all charges were compressed to the limit of seating with the various bullet weights and styles used in the heavy Browning cases. While these charges gave near maximum pressures in this rifle with the components used, they were limited more by case capacity than by high pressures; they should not be used, however, in other rifles without starting at least two grains below and working up; there may be some error in muzzle velocities of some bullets due to unknown ballistic coefficient (Rifle Issue #36 - November, 1974)
Be Alert: Publisher cannot be responsible for errors in published load data.
Wt. Bullet Powder Manufacturer Powder Charge Velocity (FPS)
500 Hornady SP IMR IMR-4320 Click Here 2,208
500 Hornady SP Norma N-203 Click Here 2,216
500 Hornady SP IMR IMR-4198 Click Here 2,133
500 Hornady SP IMR IMR-3031 Click Here 2,165
500 Hornady SP Winchester W-748BR Click Here 2,216
500 Hornady SP IMR IMR-4320 Click Here 2,066
500 Hornady SP IMR IMR-4320 Click Here 2,245
500 CCB PSP BT IMR IMR-4320 Click Here 2,201
500 CCB PSP BT IMR IMR-3031 Click Here 2,178
500 Browning solid IMR IMR-4320 Click Here 2,132
400 CCB PSP BT IMR IMR-4198 Click Here 2,365
400 CCB PSP BT IMR IMR-3031 Click Here 2,362
400 CCB PSP BT Winchester W-748BR Click Here 2,388
400 Speer SP IMR IMR-4198 Click Here 2,330
350 Hornady SP IMR IMR-4198 Click Here 2,553
350 Hornady SP Winchester W-748BR Click Here 2,486
300 Sierra SP IMR IMR-4198 Click Here 2,733
 

.45 Caliber Reloading Data