.458 Winchester Magnum (25-Inch Barrel) Load Data

10 published .458 Winchester Magnum (25-Inch Barrel) reloading recipes across 5 powders and 3 bullet manufacturers, with bullet weights from 350 to 500 grains and recorded velocities between 2,069 and 2,508 fps. Every load lists charge weight, velocity, COAL, primer and case where the source published it.

Always begin at the minimum charge weight and work up gradually. Never exceed maximum loads. Verify all data against a current published reloading manual before use. LoadDevelopment.com is not responsible for errors or omissions in this data.
Recipes
10
Powders
5
Bullet makers
3
Bullet weights
350–500 gr

Sample .458 Winchester Magnum (25-Inch Barrel) loads

The first 5 of 10 recipes.

BulletPowderChargeVelocityCOALPrimer
Speer SSP 350grAccurate AAC-201577 gr2,508 fps——
Barnes X-Bullet 400grAccurate AAC-201574 gr2,368 fps——
Trophy SSP 400grAccurate AAC-201576 gr2,419 fps——
Speer AGS SP 500grAccurate AAC-223075 gr2,069 fps——
Speer AGS Solid 500grAccurate AAC-223078 gr2,138 fps——

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