Load data for .458 Win.Mag. + 420gr Impala RNFP KO
404 suitable loads across 74 powder(s) for cartridge .458 Win.Mag. with 420gr Impala RNFP KO bullet.
The most recommended powders for this combination are Alliant Power Pro 1200-R, SNPE Vectan SP 10 and ADI AR 2219.
Based on C.I.P., the max. allowed case length is 2.500 in / 63.50 mm, the max. cartridge length is 3.340 in / 84.84 mm, and the max. allowed pressure is 62,366 PSI / 4,300 bar.
Based on C.I.P., the max. allowed case length is 2.500 in / 63.50 mm, the max. cartridge length is 3.340 in / 84.84 mm, and the max. allowed pressure is 62,366 PSI / 4,300 bar.
Load Specifications
ImperialMetric
Cartridge:.458 Win.Mag. load data
Case Length (L3):2.500" | 63.5 mm
Cartridge Length (COL/L6):•••
Seated Depth:0.569" | 14.5 mm
Case Capacity:95 gow | 6.16 cm³
Primer Size:Large Rifle Magnum (LRM)
Max. Pressure (C.I.P.):62,366 psi | 4,300 bar
Barrel Length:24.0" | 610 mm
Min. Twist Rate:Stabilizes in any common twist
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