.458 RCBS Load Data

15 published .458 RCBS reloading recipes across 6 powders and 2 bullet manufacturers, with bullet weights from 300 to 500 grains and recorded velocities between 1,857 and 2,282 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
15
Powders
6
Bullet makers
2
Bullet weights
300–500 gr

Sample .458 RCBS loads

The first 5 of 15 recipes.

BulletPowderChargeVelocityCOALPrimer
Hornady & Sierra 300grIMR IMR-303165.0 gr2,282 fps—Federal 210 Large Rifle
Hornady & Sierra 300grIMR IMR-406467.0 gr2,206 fps—Federal 210 Large Rifle
Hornady & Herters 350grIMR IMR-406468.0 gr2,153 fps—Federal 210 Large Rifle
Hornady & Herters 350grIMR IMR-406470.0 gr2,220 fps—Federal 210 Large Rifle
Hornady & Herters 350grWinchester W-74869.0 gr2,198 fps—Federal 210 Large Rifle

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