.458 Winchester Magnum Load Data Load Data

17 published .458 Winchester Magnum Load Data reloading recipes across 5 powders and 3 bullet manufacturers, with bullet weights from 300 to 500 grains and recorded velocities between 2,066 and 2,733 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
17
Powders
5
Bullet makers
3
Bullet weights
300–500 gr

Sample .458 Winchester Magnum Load Data loads

The first 5 of 17 recipes.

BulletPowderChargeVelocityCOALPrimer
Sierra SP 300grIMR IMR-419874.0 gr2,733 fps——
Hornady SP 350grIMR IMR-419870.0 gr2,553 fps——
Hornady SP 350grWinchester W-748BR86.0 gr2,486 fps——
CCB PSP BT 400grIMR IMR-303175.0 gr2,362 fps——
CCB PSP BT 400grIMR IMR-419867.0 gr2,365 fps——

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